|Cirrus Logic EP9302 200MHz ARM9 (ARMv4T)|
1.1 About this Manual
This manual is intended to provide the user with an overview of the board and benefits, complete features specifications, and set up procedures. It contains important safety information as well.
1.2 TS-72XX Series
The TS-72XX series Single Board Computers (SBC's) run on a 200 MHz ARM9 processor with power as low as 1/2 Watt. Low board complexity, low component count, and low power/heat makes for an extremely reliable embedded engine. The TS-72XX SBC's are available in thousands of configurations, many of which are Commercial off the Shelf (COTS) and available to ship today.
The EP9302 processor from Cirrus is the highly integrated 200Mhz ARM9 processor that the TS-72XX SBC's are built around and includes an on-chip 10/100 ethernet, USB, serial, and Flash/SDRAM controller. For example, on the TS-7200 model there is 32 Mb of Micron SDRAM running at 66 Mhz and 8 Mb Intel Strata flash on-board. A supplemental PLD provides glue logic, watchdog timer, Compact Flash IDE, and 8 bit PC/104 support. Integer CPU performance is about 20% faster than our 133 Mhz x86 offerings. Even with the standard power consumption of 2 Watts, the TS-72XX SBC's run without fans or heat sinks in the temperature range of -20 to +70°C. Extended Temperature -40° to +85°C is also standard, but CPU clock must be decreased to about 166MHz for higher temperatures. Digital Signal Processing (DSP) is enabled through a standard 5 channel, 12bit A/D converter (Optional 8 channel, 12 bit A/D converter), 20 DIO lines and 2 standard serial ports.
The 8/16 bit PC/104 interface enables additional functionality through Technologic Systems' broad product line of PC/104 peripheral daughter boards. The TS-7KV adds video, CAN, Com Ports, and A/D conversion. The TS-ETH10 allows the addition of Ethernet ports. The TS-CAN adds CAN connectivity. The TS-Modem boards add both wired and cell phone capabilities.
The TS-72XX rugged ARM9 SBC's have found their way into many embedded applications. Customers are using the TS-72XX series SBC's in: energy generation, manufacturing process control, traffic management, printing system management, communication infrastructure, website hosting, data gathering and laboratory test equipment. We use a TS-7200 to host our complete website and to prepare and test your SBC prior to shipping.
1.3 Product Overview
The TS-7260 is a compact, full-featured Single Board Computer (SBC) based upon the Cirrus EP9302 ARM9 CPU. The EP9302 features an advanced 200 MHz ARM920T processor design with a memory management unit (MMU) that allows support for high level operating systems such as Linux, Windows CE, and other. As a general-purpose processor, it provides a standard set of peripherals on board and a full set of Technologic Systems featured peripherals via the standard PC/104 Bus.
|Note:||This board includes software power control for on board peripherals to minimize
power consumption (as low as ½ Watt) for use in power sensitive designs - ideal for battery-powered applications.
Out-of-the-Box Productivity Technologic Systems Linux products get you to your application quickly. Our Single Board Computers boot directly to Linux as shipped. There is no complicated CMOS setup or configuring of a Linux derivative Operating System to source, define, and load. Technologic Systems has pre-configured each SBC in flash memory.
The TS-7260's user can power up the board and immediately begin application development. Of course, should you wish to configure your own version of Linux or use a different operating system, this is easy too. Technologic Systems provides the solution to fast application development without tedious OS configuration.
Impressive Performance The ARM920T's 32-bit architecture, with a five-stage pipeline, delivers very impressive performance at very low power. The EP9302 CPU has a 16 KB instruction cache and a 16 KB data cache to provide zero-cycle latency to the current program and data, or they can be locked to guarantee no-latency access to critical sections of instructions and data. For applications with instruction-memory size restrictions, the ARM920T's compressed Thumb instruction set can be used to provide higher code density and lower Flash storage requirements.
As a benchmark, the TS-7260's CPU integer performance, at a supplied 200 MHz, is about twice as fast as the Technologic Systems 133MHz 586-based products.
Low Power Consumption The TS-7260 is a design optimized for low power consumption. This design allows for power consumption as low as a ½ watt. There are three on-board switching power supply circuits that generate all of the internal voltages required by the TS-7260. This allows for a very flexible input power source of 4.5 to 20 VDC and can be unregulated. The on-board ADC measures input voltage for battery or solar applications, allowing software monitoring of input voltage. It is also possible to control and minimize power consumption using software programming to enable shutdown of USB, LCD, Ethernet, and RS232 level converters.
The TS-7260 comes standard with these features:
- Requires less than 1 watt for full-speed operation
- 1/4 watt at lower speeds
- High efficiency switching-mode power supply (4.5-20VDC Unregulated Input)
- TS-Linux Embedded Operating System Installed
- 200Mhz ARM9 CPU with MMU
- 32 MB on-board NAND flash (Boots to TS-Linux)
- 32 MB SDRAM
- 2 USB 2.0 Compatible OHCI ports (12 Mbit/s Max)
- 10/100 Ethernet port
- 3 serial ports standard
- 30 total DIO pins
- TS-XDIO (8 schmitt-trigger DIO - PWM, quadrature counter, edge counter, pulse timer)
- 2-channel on-board 12-bit A/D Converter
- Watchdog timer
- PC/104 expansion bus
- SPI bus interface
- Alphanumeric LCD and matrix keypad interfaces
- Small size 3.8 x 4.8 inches (9.7 cm x 11.5 cm)
- Operating Temperature Range: Fanless from -20° to +70°C
- Extended Temperature -40° to +85°C standard at lower CPU clock speeds (166Mhz)
|Note:||The TS-XDIO interface is the standard feature. The SD Card flash socket (on Revision B) and the two extra COM ports are the available options for TS-7260. However, these three features can not be simultaneously selected. Only one functionality can be ordered for a single user configuration.|
The TS-7260 can be configured for your application using the following available on-board options and external accessories:
1.6.1 On-board Options
- TS-7xxx-yyy-zzzF: up to 'yyy' MB of on-board SDRAM and 'zzz' MB of Flash memory
upgrade for TS-7xxx board models. For example, TS-7260-64-128F selects model TS- 7260 upgrade with 64 MB of SDRAM and 128 of NAND Flash.
|Model (xxx)||SDRAM (yyy)||on-board Flash (zzz)|
|TS-7200||Up to 64 MB||Up to 16 MB|
|TS-7250||up to 64-128 MB||Up to 64-128-256 MB|
|TS-7260||up to 64-128 MB||Up to 64-128-256 MB|
- OP-ADC: 12 bit 8 channel A/D Converter (TS-7200 and TS-7250)
- OP-2TTLCOM: Two additional COM (COM4 and COM5) ports with TTL levels (TS- 7260)
- OP-SDSOCKET: One SD Card socket for additional flash memory (TS-7260)
- OP-BBRTC: on-board sealed-battery backed RTC
- OP-TMPSENSE: High-precision temperature sensor
- OP-485-FD: RS-485 full duplex interface on COM2
- OP-485-HD: RS-485 half duplex interface on COM2
- OP-16BIT-104: 16-bit PC/104 Connector
- OP-STHRU-104: 16-bit Pass-Thru PC/104 Connector
- OP-ROHS: RoHS directive compliant built board
|Note:||The TS-7260 SBC can be built compliant with the RoHS (Restriction of Hazardous Substances ) Directive. Contact Technologic Systems for RoHS support.|
1.6.2 External Accessories
- CF-512-LIN: 512 MB Compact Flash Card with full ARM tool chain and Debian installed (TS-7200)
- SD-256: 256 MB SD Flash Card with full ARM tool chain installed and Debian (TS-7260)
- SD-512: 512 MB SD Flash Card with USB Interface, full ARM tool chain installed and Debian (TS-7260)
- USB Flash Drive: 256 MB with full ARM tool chain installed and Debian
- OP-EJECT: Compact Flash Ejector (TS-7200)
- WIFI-G-USB: Linux-supported USB 802.11g WiFi transceiver for wireless networking
- OP-LCD-LED: Alphanumeric 2x24 LCD with back light and cable
- OP-KPAD: Matrix keypad with cable
- PS-5VDC-REG: Regulated 5VDC Power Supply, 110 VAC Input
- TS-ENC720: Metal Enclosure with Power Converter
- RC-DB9: COM2 adapter cable to DB-9
In addition, a complete set of interfacing cables, connectors, and enclosures is available.
|Note:||Check our website at http://www.embeddedARM.com for an updated list of options and external accessories|
1.7 PC/104 Peripherals
Technologic Systems offers many add-on peripherals to complete the requirements of your application. These products directly interface with the TS-7260 using the PC/104 bus, adding a wide variety of functionalities at very reasonable prices. Some of these functionalities includes:
- NVRAM - adds 32K, 128K, 1MB or 2MB bytes of battery-backed SRAM. Battery backed SRAM provides non-volatile memory with very fast write times and unlimited write cycles, unlike Flash memory. This can be very important if the data is constantly being updated several times per minute, since Flash devices can wear-out after a few million write cycles. It also eliminates the latency that Flash memory has during write cycles. This resource is a byte-wide memory device using a lithium battery that will last a minimum of 10 years with or without power applied.
- Analog VIDEO interface - When a video monitor is needed.
- CAN Bus - Useful for automotive applications.
- Modems - Phone Line or GSM Cellular modems.
- Additional Ethernet ports.
- Additional DIO interface with either 24 or 64 new lines..
- Additional 12 bit ADC and DAC: useful for industrial automation applications.
- Additional COM and Parallel ports - Make more communication channels available.
- Radios - Long-range wireless radios, Xbee modules
|Note:||New PC/104 boards are always in development. Contact Technologic Systems or visit the PC/104 peripherals page at our website for a complete and updated list of additional functionalities that can be added to the TS-7260 using the PC/104 bus. You can also contact Technologic Systems about your custom project design.|
1.8 TS-ARM Development Kit
The TS-ARM Development Kit for the TS-7260 Single Board Computer includes all equipment necessary to boot into the operating system of choice and start working. The development kit is highly recommended for a quick start on application development. The TS-ARM Development Kit contains a 256 or 512 MB Flash drive (Compact Flash for 7200, USB thumbdrive for 7250 and 7260) which includes:
- a self-hosting ARM installation of the Debian Linux 2.0 distribution compiled for ARM
- gcc 2.95.4 and gcc 3.0 compiler with full tool-chain
- Build tools and source for JFFS/YAFFS file system in on-board NAND Flash.
- Hardware test routines source code and other example source code
- Debian package system: apt-get, tasksel, dselect The development kit additionally includes:
- USB Compact Flash reader for TS-7200
- 5 VDC regulated power supply (international versions available)
- NULL modem cable
- Adapter cable from 10-pin header to DB9
- Various cables for connection DIO, LCD, Keypad, etc.
- Development CD with complete TS-Kernel source, manuals, example code, etc.
- Printed supporting documentation for TS-72XX's Hardware, Linux for ARM and Development Kit.
|Note:||Single Board Computer is not included on the Development Kit (sold separately).|
1.9 Software and Support
Technologic Systems provides:
- Free system software and documentation updates available on our web site
- Free technical support by phone, fax, or email
- 30-day, money back guarantee on evaluation units
- One-year, full warranty
1.9.1 Linux OS Support
The ARM processor (the EP9302) comes from Cirrus and the platform is very similar to the Cirrus EDB9302 evaluation board. Cirrus has strongly promoted running Linux on this chip and has done most of the legwork in creating a patch set to the Linux 2.4 kernels, but we have also had to modify the Linux Kernel (TS-Kernel) so it can support the 8MB onboard Flash chip (via mtd drivers), the compact flash IDE driver, and the A/D converter. If you want to use Linux and aren't tied to the x86 architecture, the TS-72XX boards can be very cost-effective.
The TS-72XX SBC's are shipped standard with the compact TS-Linux embedded operating system installed in the on-board Flash memory. The fullfeatured Debian Linux can also be used with an NFS root file system or larger Flash drives, such as Compact Flash cards, SD cards and USB flash drives. The TS-Kernel used is based upon the version 2.4.26, patched and compiled for the Cirrus EP9302 ARM920T processor, and is real-time capable through RTAI.
The root file system used by the Linux OS can be any of the following:
- JFFS/YAFFS file system image in the on-board Flash (if using RedBoot, it should include the option root=/dev/mtdblock1 to instruct the kernel to boot here)
- EXT2 file system image in the Compact Flash card (if using RedBoot, it should include the option root=/dev/hda)
- NFS root, via Ethernet port (if using RedBoot, it should include the option root=/dev/nfs nfsroot=<IP>:<DIRECTORY> ip=dhcp)
|Note:||The TS-Kernel supports the Real-Time Application Interface (RTAI project), making the embedded operating system capable of handling applications with hard real-time restrictions.|
1.9.2 Other OS Support
The TS-7260 can be loaded with other operating systems such as NetBSD, etc. Technologic Systems may provide support for these, and possibly other operating systems, in the future. Currently, only Linux and NetBSD are supported on the TS-7260.
2 Getting Started
2.1 Installation Procedure
Before performing any set up or placement procedures, take the precautions outlined in this section.
2.1.1 Handling the Board Safely
Be sure to take appropriate Electrostatic Discharge (ESD) precautions. Disconnect the power source before moving, cabling, or performing any set up procedures.
|WARNING:||Inappropriate handling may cause damage to the board.|
2.1.2 Setup and Installation Instructions
Follow these guidelines for safety and maximum product performance:
- Observe local health and safety requirements and guidelines for manual material
2.1.3 Setup Tools
Depending on placement and cabling, you may need the following tools:
- Small flat-blade screwdriver
- Small Phillips screwdriver
2.1.4 Setup Procedure
After locating, setting up, grounding, and cabling the TS-7260:
- Apply power
- Monitor the TS-7260 using a terminal emulator to verify that the board is operating properly
|Note:||Your board might include a screw power connector on the power input. Notice this connector is removible. Please pull this connectior off before applying power.|
2.1.5 Disconnecting AC Power
- Unplug from the power source.
- Disconnect other cables as required.
2.2 Console and Power Up
The TS-72XX SBC's have no video controller or keyboard interface. This was done to keep the board size small and the cost low. COM1 is typically used as a console port to interface the TS-72XX to a standard terminal emulation program on a Host PC. An ANSI terminal or a PC running a terminal emulator is required to communicate with your Embedded PC. Simply connect an ANSI terminal (or emulator) to COM1 (DB9 female connector) using a null modem cable (this is included in the TS-ARM Development Kit), using serial parameters of 115,200 baud, 8 data bits, no parity, no flow control, 1 stop bit, and make sure jumper JP2 is installed. If you are running Linux, the minicom program works well, Windows users can run the Hyperterm application. Technologic Systems offers a null modem cable with both 25 pin and 9 pin connectors at each end as part number CB7-05. Some systems also require the 10-pin header to 9-pin Sub-D adapter which is P/N: RC-DB9.
The console can be changed to COM2 by installing JP4 (with JP2 also installed). If your application does not require a console or both COM ports are required, then removing the jumper JP2 easily disables all console output. Connect a regulated 5VDC, (1A minimum) power source using the included 2 screw terminal strip/connector. Please note the polarity printed on the board. The boot messages, by default, are all displayed on COM1 at 115200 baud.
2.3 Boot Sequence
The boot sequence has four distinct stages:
- TS-BOOTROM messages
- RedBoot ROM monitor messages
- Linux Kernel messages
- Login prompts
Upon power up, the board executes proprietary Technologic Systems boot-code, TSBOOTROM, then immediately executes RedBoot. RedBoot is a feature rich boot-ROM monitor, that allows manipulation of the on-board flash, JFFS2/YAFFS2 images, loading and execution of a kernel or executable from either tftp (trivial ftp), serial console, or from flash, and offers GDB debugging stubs.
If not interrupted by the user within one second, a pre-existing RedBoot script is executed, loading a default Linux kernel into memory from on-board flash. This will cause the preexisting JFFS2/YAFFS2 file-system to boot.
One can view the RedBoot defaults for the board, as well as the default script, by entering at the RedBoot command prompt:
$ fconfig -l
The defaults can be changed by simply entering 'fconfig' at the RedBoot prompt and answering the prompts. A final chance to write or discard the changes to the board will be given by RedBoot.
The default script instructs RedBoot to load the Linux kernel from the flash, and instruct the Linux kernel to use the JFFS2/YAFFS2 image on the flash chip for its root file-system. The Linux kernel must be loaded into memory address 0x00218000. Loading the kernel from flash is done automatically by RedBoot in the default script with the following command:
$ fis load vlinux
After loading the kernel, the default script then executes the kernel with the following command:
$ exec -c "console=ttyAM0,115200 root=/dev/mtdblock1"
After the TS-Kernel is loaded, The login prompt is displayed. Type 'root' at the login prompt, without a password. A Bash shell login prompt will then appear. At this point, the TS-7260 is executing the run-time Technologic Systems Linux kernel and accepting user commands.
2.4 Loading or Transferring Files
Three methods are available for transferring files between a desktop PC and your TS- 7260: Ethernet downloads, flash memory devices, and Zmodem downloads. Full descriptions of each are detailed below. Other programs that use serial ports to transfer should work as well.
2.4.1 Transferring Files via the Ethernet Port
The default JFFS Linux root file system includes a small FTP server that can be used for uploading/downloading of files across an Ethernet network. Simply point your preferred FTP client to your TS-7260 IP address (default is 192.168.0.50). You can login as root or any valid user previously created from the useradd utility. By default, the JFFS image will not accept anonymous FTP.
2.4.2 Transferring Files via Flash Memory Device
With the TS-7260, an SD card or an USB flash memory card can be used to easily move files from a host system. USB memory devices need no extra accessory to connect to a host PC while adapters may be required for SD cards. USB can be hot-swapped on the TS-7260 while the SD card cannot. See the USB Flash Drive section for information on loading drivers and using chroot to use Debian on a USB drive.
2.4.3 Zmodem Downloads
Using the Zmodem protocol to send files to and from the TS-7260 SBC is simple and straightforward. The only requirement is a terminal emulation program that supports Zmodem, and virtually all do. If you are using Windows 95 or later for your development work, the HyperTerminal accessory works well. To download a file to the TS-7260 from your host PC, execute lrz at the Linux command line on the TS-7260 (while using console-redirection from within your terminal emulator) and begin the transfer with your terminal emulator. In HyperTerminal, this is 'Send File...' from the 'Transfer' menu. To upload a file from the TS-7260 to your host PC, execute lsz <FILENAME> at the Linux command line on the TS-7260 and start the transfer in your terminal emulator. Many emulators, HyperTerminal among them, will automatically begin the transfer themselves. Occasionally there may be errors in transmission due to background operations. This is not a problem -- Zmodem uses very accurate CRC checks to detect errors and simply resends bad data. Once the file transfer is complete the file is completely error free. For best results when using HyperTerminal, the hardware handshaking must be enabled in HyperTerminal.
3 Hardware Components
The following picture shows where the main headers, connectors and most important hardware components are located on the TS-7260. Understanding this picture will help you to follow the header-connector oriented organization of this manual. The blue marked objects on the picture are the on-board chips and components, while the red ones are the various on-board headers and connectors for peripherals.
3.1.1 Cirrus EP9302
The EP9302 features an advanced 200 MHz ARM920T processor design with a memory management unit (MMU) that allows support for high-level operating systems such as Linux, Windows CE, and other embedded operating systems. The ARM core operates from a 1.8 V supply, while the I/O operates at 3.3 V with power usage between 100 mW and 750 mW (dependent on speed). As a general-purpose processor, it provides a standard set of peripherals on board and a full set of Technologic Systems add-on peripherals via the standard PC/104 Bus.
The ARM920T's 32-bit architecture, with a five-stage pipeline, consisting of fetch, decode, execute, memory, and write stages, delivers very impressive performance at very low power. The EP9302 CPU has a 16 KB instruction cache and a 16 KB data cache to provide zero-cycle latency to the current program and data, or they can be locked to guarantee no-latency access to critical sections of instructions and data. For applications with instruction-memory size restrictions, the ARM920T's compressed Thumb instruction set can be used to provide higher code density and lower Flash storage requirements.
EP9302 key features include:
- ARM (32-bit) and Thumb (16-bit compressed) instruction sets
- 32-bit Advanced Micro-Controller Bus Architecture (AMBA)
- 16 kbyte Instruction Cache with lockdown
- 16 kbyte Data Cache (programmable write-through or write-back) with lockdown
- MMU for Linux®, Microsoft® Windows® CE and other operating systems
- Translation Look Aside Buffers with 64 Data and 64 Instruction Entries
- Programmable Page Sizes of 1 Mbyte, 64 kbyte, 4 kbyte, and 1 kbyte
- Independent lockdown of TLB Entries
For further information about the EP9302 features, refer to the EP9301 User's Guide.
|Note:||The EP9302 is identical silicon to the EP9301 except it is rated to run at 200 Mhz, instead of 166 Mhz. The available EP9301 User's Guide can still be used as the main reference manual.|
The EP9031 features a Memory Management Unit, enabling high level operating systems such as Embedded Linux and Windows CE to run on the TS-7260. In the same way, the Linux TS-Kernel takes advantage of the MMU functionality. The MMU is controlled by page tables stored in system memory and is responsible for virtual address to physical address translation, memory protection through access permissions and domains, MMU cache and write buffer access. In doing so, software applications can access larger "virtual" memory space than the available physical memory size, allowing multiple programs to run and use the system memory simultaneously. For further information about the MMU functionalities, refer to the EP9301 User's Guide.
The EP9302 interrupt controller allows up to 54 interrupts to generate an Interrupt Request (IRQ) or Fast Interrupt Request (FIQ) signal to the processor core. Thirty-two hardware priority assignments are provided for assisting IRQ vectoring, and two levels are provided for FIQ vectoring. This allows time critical interrupts to be processed in the shortest time possible.
Internal interrupts may be programmed as active high or active low level sensitive inputs. GPIO pins programmed as interrupts may be programmed as active high level sensitive, active low level sensitive, rising edge triggered, falling edge triggered, or combined rising/falling edge triggered. The EP9302 interrupt controller also includes the following features:
- Supports 54 interrupts from a variety of sources (such as UARTs, GPIO and ADC)
- Routes interrupt sources to either the ARM920T's IRQ or FIQ (Fast IRQ) inputs
- Three dedicated off-chip interrupt lines operate as active high level sensitive interrupts
- Any of the 19 GPIO lines maybe configured to generate interrupts
- Software supported priority mask for all FIQs and IRQs
|Note:||For peripheral driver development purpose, notice that the external IRQ lines 5,6 and 7, which are ISA/X86 architecture based, are mapped to EP9302 external interrupt lines 22, 33 and 40, respectively. For further information about interrupts, including the EP9302 interrupt controller and map, refer to the EP9301 User's Guide, chapter 5.|
TS-7260 uses four types of memory. The SDRAM is the fast access volatile memory used to run applications by the processor and the on-board flash is the non-volatile memory used for storage purpose. Flash memory may also be added using USB memory drivers.
3.2.1 On-Board SDRAM
The TS-7260 uses 32 MB SDRAM technology to provide 32 or 64 MB of high-speed volatile memory. The memory is soldered directly to the board, making the TS-7260 more reliable in high-vibration environments. The TS-7260's RAM is not contiguous in the physical memory map of the EP9302. But the MMU is programmed to remap the blocks of RAM to appear as a contiguous block of memory at the very beginning of the virtual memory map. In the case of a 256 Megabit SDRAM chip (32 MB), it is located at 0 through 32 MB in the virtual memory map. Refer to the MMU section of this manual to understand how the physical memory is mapped and the virtual memory is translated.
|Note:||It is possible to use larger sizes of the SDRAM chip than the standard 32 MB one. The TS-7260 is designed to accommodate both 32 MB and 64 MB chips, providing up to 128 MB of RAM memory. Contact Technologic Systems for larger SDRAM sizes.|
3.2.2 Battery Backed SRAM
There is a peripheral board available for the TS-7260 named TS-NVRAM that adds 32K bytes or 128 Kbytes or 512K bytes of battery-backed SRAM. Battery backed SRAM provides non-volatile memory with very fast write times and unlimited write cycles, unlike Flash memory. This can be very important if the data is constantly being updated several times per minute, since Flash devices can wear-out after a few million write cycles. It also eliminates the latency that Flash memory has during write cycles, since Flash technology write cycles are about 10-100 times slower than read cycles. The TS-NVRAM peripheral board is located at the PC/104 memory space base address of 0x11AA_0000. This resource is a byte-wide memory device using a lithium battery that is guaranteed to last a minimum of 10 years with or without power applied.
3.2.3 On-Board NAND Flash
The TS-7260 uses a NAND Flash chip for its on-board Flash resource. The physical address of the Flash chip is 0x6000_0000. The first 16KB is reserved for the TSBOOTROM code. The TS-BOOTROM code initializes various internal configuration registers for proper operation, and initializes and tests the SDRAM. The last 3 MB are reserved for the RedBoot ROM monitor, RedBoot FIS (Flash Image System) and RedBoot FCONFIG (Flash configuration). The Linux kernel shipped by default is pre-loaded in the FIS and the default boot script and Ethernet MAC address are contained in the FCONFIG. You may also use the RedBoot FIS to store and load images that contain eCos applications or other OS/RTOS boot loaders. The rest of the on-board flash is used for the Linux YAFFS2 file system. This is a journaling file system that is aware of the wear-out mechanism of the NAND flash and incorporates ECC algorithms at the file system level to maximize Flash lifetime. It is also extremely tolerant of power failures during file write sequences. The entire Flash chip can be write-protected by removing Jumper 3. When JP3 is not installed, the Flash chip becomes a read-only resource.
|Note:||It is possible to use larger sizes of the NAND Flash than the standard 32 MB chip. The TS-7260 is designed to accommodate both 32 MB and 128 MB chips, providing up to 256 MB of on-board flash. Contact Technologic Systems for larger Flash sizes.|
|Note:||The YAFFS1 file system runs on the TS-7260 boards that feature NAND chips with 512 byte page size, enabling up to 128 MB of on-board flash. The YAFFS2 file system supports the new NAND technology, with 2k page size, hence it will be installed on TS-7260 boards that are configured with 128-256 MB of flash.|
3.2.4 USB Flash Drive
Additional non-volatile storage may be added with a USB flash drive. These devices supply additional non-volatile storage either for data or for a complete operation system distribution, such as Debian. A tar-file of Debian is available on the Technologic Systems website. Alternatively, the developer's kit includes a USB flash thumb-drive pre-loaded with Debian. Flash memory provided by these devices behaves much as a hard drive does with sizes ranging from 32 MB to 32 GB. These products are inherently more rugged than a hard drive since they are completely solid-state with no moving parts with the added advantage of being removable.
Drivers for USB can be loaded by running the script
/usr/bin/loadUSBModules.sh once booted.
It is possible to load the Debian environment on our pre-formatted USB drives by first running the above script, and then running
/usr/bin/loadUSB.sh to chroot in to the Debian environment.
3.2.5 SD Memory Card
Technologic Systems has a full license for using the additional SD features which are reserved for members of the SD Card Association. This has allowed us to design both the hardware logic core and software specifically tuned to the capabilities of the TS-7260 CPU using the official SD specification documents. Since both a Linux driver module and an ARM9 object file containing OS-independent access routines are provided to customers purchasing the board hardware, customers do not have to seek SD licensing themselves. SD Memory Card technology provides large capacity and fast access combined with a compact and slim profile, making it very appealing for a wide range of next generation products and applications. In addition, SD Cards feature content protection, planned capacity growth, high-speed data transfer, and a write protect switch. These devices supply additional non-volatile storage either for data or for a complete operation system distribution, such as Debian, to be used with the TS-7260 SBC. The Technologic System SD Card core is a very small implementation and can be integrated on the TS-7260 CPLD and/or the TS-7300 FPGA. Four 8-bit registers are available for the software layer to control the SD Card hardware:
|BASE + 0||SDCMD||SD Command register|
|BASE + 2||SDDAT||SD Data register|
|BASE + 4||SDSTATE||SD State register|
|BASE + 6||SDCTRL||SD Control register|
126.96.36.199 SDHC Media
SDHC media is supported by the TS-7260 hardware. To enable the use of this media in Linux kernel version 2.4, simply replace the Linux 'sdcard.o' driver in your SD Card image (both in the initrd and the primary Debian partition) with the one located here and rename it to 'sdcard.o'.
3.3 Glue Logic CPLD
The TS-72XX ARM SBC's include a CPLD (a Xilinx 9572 on TS-7200 and TS-7250, or an Altera MAXII on TS-7260) which is responsible for taking control over the internal components communication through glue logic implementation. For instance, the CPLD is used to control the NAND flash through internal registers configuration. The CPLD handles control signals on the PC104 bus, has a watchdog timer, enables jumper settings reading, handles the reset button, interfaces to the real-time clock and controls the EEPROM chip select. It also implements peripheral features that, together with EP9302 modules, makes available an advanced set of communication ports, DIO pins, ADC converters, and others.
The inclusion of a CPLD on the SBC allows customized programming for customers with special needs, without having to do a more expensive board redesign. For example, the MAXII CPLD on the TS-7260 can be configured with three different cores:
- 2TTLCOM option: 2 extra TTL-only serial ports with TX enable signals and that includes a very simple GPIO core (data direction register and data register only).
- TS-XDIO option: uber-GPIO that can do quadrature, PWM, freq-counter, pulse timing, IRQ and DRQ, etc
- SDSOCKET option: a special core for a SD interface that requires a special Linux driver module to be of use.
3.4 Real-Time Clock
The TS-7260 optionally supports a Non-volatile Battery-backed real-time clock (RTC) which is soldered onto the board. This option uses an ST Micro M48T86PC1 module for the real-time clock function. This module contains the lithium battery, 32.768 kHz crystal, and a RTC chip with 114 bytes of battery-backed CMOS RAM. It will maintain clock operation for a minimum of 10 years in the absence of power. The 114 bytes of non-volatile RAM, physically located in the RTC chip, are available to the user. The RTC is accessed using two registers. The write-only index register is located at physical address location 0x1080_0000 and the RTC data register is location at physical address location 0x1170_0000. These are byte-wide registers (access with 8 bit width, eg. peekpoke 8 0x10800000) with the Index Register property of write only. The Data Register has a read/write property. Valid Index Register values are between 0 and 127, decimal. The first 14 index locations are used for accessing the RTC Time and Date registers. The next 114 locations are non-volatile RAM locations. This option is NOT compatible with the TS-5620, a peripheral board that also uses an ST Micro RTC module for real-time clock functionality. While the two options are mutually exclusive, it is possible to use the TS-5620 peripheral board on a TS-7260 that does not have the on-board RTC option installed. Any source code that utilizes the RTC is compatible with both optional installations. The TS-Kernel shipped with the boards includes support for the TS-5620 peripheral board.
3.4.1 Watchdog Timer
The TS-7260 incorporates a Watchdog Timer (WDT) unit. The WDT can be used to prevent a system "hanging" due to a software failure. The WDT causes a full system reset when the WDT times out, allowing a guaranteed recovery time from a software error. To prevent a WDT timeout, the application must periodically "feed" the WDT by writing a specific value to a specific memory location.
|WDT Control register||0x2380_0000||Read/Write|
|WDT Feed register||0x23C0_0000||Write Only|
The WDT Control register must be initialized with the timeout period desired. This may be as short as 250 mS or may be as long as 8 seconds. After the WDT has been enabled, the WDT counter begins. The application software can reset this counter at any time by "feeding" the WDT. If the WDT counter reaches the timeout period, then a full system reset occurs.
In order to load the WDT Control register, the WDT must first be "fed", and then within 30 uS, the WDT control register must be written. Writes to this register without first doing a "WDT feed", have no affect. In order to clear the WDT counter (feeding the watchdog), a value of Hex 05 must be written to the WDT Feed register.
By default, a user process does not have the physical address space (access) of the watchdog registers mapped. When using the Linux OS, the watchdog can be reached from user C code by using the mmap() system call on the /dev/mem special file to map the areas of physical address space into process user address space. See section 3.4.
|WARNING:||Use only the Watchdog Timer implemented by Technologic Systems in the CPLD. The Watchdog Timer included in the EP9302 has serious problems.|
4 Common Interfaces General Information
The purpose of this section is to provide general information about the common interfaces, such as Serial Ports and Digital Input/Output, which appear in more than one header or connector of the TS-7260. For further information on these features, refer to the Connectors and Headers section of this manual.
4.1 Serial Ports
The TS-7260 have two asynchronous serial ports (COM1 and COM2) which provide a means to communicate with external serial devices. Each is independently configured as a 16C550-type COM port that is functionally similar to a standard PC COM port. These ports have 16-byte FIFOs in both the receive and the transmit UART channels. Both COM ports can support all standard baud rates up through 230.4Kbaud. Both COM ports may be configured to use a DMA channel (useful when very high baud rates are being used). COM1 and COM2 UARTs can generate:
- Four individually maskable interrupts from the receive, transmit, and modem status logic blocks
- A single, combined interrupt that is asserted if any of the individual interrupts are asserted and unmasked
The COM1 port can also support the HDLC protocol. Refer to the Cirrus EP9301 User's Guide for more details. The COM2 port can optionally support RS-485 half or full duplex levels.
The TS-7260 has either three or five total asynchronous serial ports and the capability to add more via the PC/104 Expansion Bus. Three serial ports are standard on-board and an additional two ports on-board may be provided when the OP-2TTLCOM option is installed. (Should this option be included, the TS-XDIO capabilities are not available). Each is independently configured and is functionally similar to a PC COM port. The characteristics of each serial port differ and are noted in the following table:
|On-board by Default||On-board Optional||PC/104|
|Maximum Baud Rate||230.4Kbps||230.4Kbps||115.2Kbps||115.2Kbps||115.2Kbps||1000Kbps|
|Minimum Baud Rate||110bps||110bps||2400bps||2400bps||2400bps||no lower limit|
|Data bits||7, 8||7, 8||7, 8||8||8||7, 8, 9|
(TTL available if
|FIFO||16 bytes||16 bytes||5 bytes
4.2 Digital I/O
There are 30 Digital Input/Output (DIO) lines available on the TS-7260. These are available on three headers labeled "DIO1," "DIO2," and "LCD", which may also assume another primary function, like the serial port option on DIO2 header. In this case, if the primary function associated with the header pin is not required by the user application, the signal is then available as a general purpose digital IO. DIO from the CPU can source 10mA and sink 4mA. TS-XDIO (fpga) can source and sink 24mA.
In the following table, signal quantities shown in bold are those that are either dedicated or possibly available as general purpose Digital IO. The header labeled LCD can be used as 11 DIO lines or as an alphanumeric LCD interface. The header labeled DIO1 has 9 DIO pins available. In addition to the DIO signals, each header also has a power pin and Ground available. The LCD Header has 5V power available, the DIO1 Header has 3.3V power, and the DIO2 Header provides a ground signal.
|DIO1 Header||DIO2 Header||LCD Header|
|Total Header Pins||16||16||14|
|Shared Primary Function||0||10||11|
|Digital IO Dedicated||9||0||0|
The DIO2 header is a 16 pin header with 10 shared multi-function pins. These pins can be XDIO, standard DIO, SD card interface (signals are run down to the SD card connector on the bottom of the TS-7260), or can have extra COM ports present on them. See the DIO2 section below for more information on configuring and using the DIO2 pins.
Three pins on the DIO header are used to bring out the EP9302 SPI bus. By using some of the DIO pins as peripheral Chip Select signals, a complete interface is available for SPI peripherals. It is also possible to bring out a fourth SPI bus function [SPI_Frame] by adding a 10 ohm resistor in the position labeled R1 on TS-7260 boards. This signal is not required for many SPI peripherals but it may prove useful in some applications.
All of the DIO lines are programmable as either inputs or outputs and the direction of each I/O pin can be individually programmed. All DIO control registers are 8-bits wide and aligned on word (32-bit) boundaries. For all registers, the upper 24 bits are not modified when written and are always read back as zeros. Every DIO pin has two registers used to access it, an 8-bit data register and an 8-bit data direction register (DDR). The DDR controls whether each DIO pin is an input or an output ("1" = output). Writing to the data register only affects pins that are configured as outputs. Reading the data register always returns the state of the DIO pin.
Many of the DIO pins (DIO_0 thru DIO_8 and LCD_0 thru LCD_7) can also be programmed to cause interrupts. The interrupt properties of these pins are individually configurable. Each interrupt can be either high or low level sensitive or either rising or falling edge triggered. It is also possible to enable debouncing on any of these interrupts. Debouncing is implemented using a 2-bit shift register clocked by a 128 Hz clock. Refer to the [EP9301 User's Guide] and see Chapter 21 for details
The 5V power output pin on the LCD Header is current limited to 1000mA to prevent excessive current. The 3.3V power on the DIO1 Header is current limited to approximately 1 Amp by a 3.3V regulator.
4.3 A/D Converters
The EP9302 A/D converter is standard on all TS-7260 boards. The Cirrus EP9302 features a 5 channel, 12-bit Analog to Digital Converter with an analog multiplexor, with an input range of 0 to 3.3 V.
The TS-7260 uses 3 of the 5 EP9302 A/D channels for on-board measurements. Only 2 channels are available on the DIO2 Header.
5 Connectors and Headers
5.1 10/100 Base-T Ethernet Connector
The EP9302 Ethernet LAN controller incorporates all the logic needed to interface directly to any MII compatible Ethernet PHY chip. A low-power Micrel KS8721 chip is used to implement the Ethernet PHY function and an integrated RJ-45 connector with built-in 10/100 transformer and LED indicators completes the Ethernet sub-system.
The TS-7260 has both a LINK/ACTIVITY LED and a 10/100 speed LED built into each RJ- 45 connector that indicates the current Ethernet status. The LINK LED (left side of connector, green) is active when a valid Ethernet link is detected. This LED should be ON whenever the TS-7260 is powered and properly connected to a 10/100BaseT Ethernet network. The LINK/ACTIVITY LED will blink to indicate network activity for either inbound or outbound data. The SPEED LED (right side of connector, amber) will be on when a 100Mb network is detected and off for a 10Mb network. Both of these LEDs are controlled by the KS8721 and do not require any overhead by the processor.
The Ethernet PHY chip can be powered down, under software control, to save approximately 90 mA of current consumption. This is controlled by the EP9302 Digital output on Port H, bit 2. A logic zero will power down the KS8721 PHY interface.
|Note:||TS-Linux provides all the software support to use the EP9302 10/100 Ethernet core. For more details, find the TCP/IP configuration instructions on the TS-Linux documentation.|
5.2 USB Connector
The USB Connector on the TS-7260 provide two USB interfaces for the user. These are directly connected to the EP9302 processor, which integrates an USB dual-port Open Host Controller Interface (Open HCI), providing full-speed serial communications ports at a baud rate of 12 Mbits/sec. Up to 127 USB devices (printer, mouse, camera, keyboard, etc.) and USB hubs can be connected to the USB host in the USB "tiered-star" topology. This includes the following features:
- USB 2.0 compatible
- Open HCI Rev 1.0 compliant
- USB device connections support at both low-speed (1.5 Mbps) and full-speed (12 Mbps)
- Root HUB integrated with 2 downstream USB ports
- Transceiver buffers integrated, over-current protection on ports
- Supports power management
- Operates as a master on the bus
|Note:||TS-Kernel implements all the necessary driver support to enable the USB OHCI. Also, a wide variety of USB drivers for devices such as mouse, keyboard and flash memory are available. Refer to the Linux for TS-ARM User's Guide or contact us for further information on how to integrate an USB device and an USB Linux driver with your TS-7260.|
5.3 SD Card Connector - CPLD
The SD Card socket (ALPS connector) at the back side of the TS-7260 enables SD Cards to be plugged to the SBC. The hardware core implemented by Technologic Systems is integrated inside the on-board CPLD. Technologic Systems has written a binary Linux driver module and a set of generic, OS-independent read/write routines for accessing the SD flash inside of an ARM object (.o) file. The format of the SD card must be in EXT2 format for proper operation with Linux as a root file system.
|Note:||On the TS-7300, the SD Card is standard bootable, but it is not on the TS-7260 by default. If you either need a bootable SD Card socket on the TS-7260 or don't want the NAND flash support on TS-7260, contact Technologic Systems.|
5.4 COM1 Connector
The COM1 RS-232 port uses a DB-9 male connector on the TS-7260.
|1||DCD||Data Carrier Detect|
|4||DTR||Data Terminal Ready|
|6||DSR||Data Set Ready|
|7||RTS||Request to Send|
|8||CTS||Clear to Send|
The base address of COM1 appears in the physical address space at 0x808C_0000.
Technologic Systems provides software drivers to access this port. This full complement of RS-232 signals (all except Ring Detect) allows COM1 to interface to almost any serial RS-232 device.
5.5 COM2 Header
The base address of COM2 appears in the physical address space at 0x808D_0000. Technologic Systems provides software drivers to access this port. COM2 has RS-232 support only for the TXD and RXD signals. This is sufficient to interface with serial devices that only require transmit and receive data lines. COM2 is accessible on a 10-pin header labeled COM2.
|Note:||The COM2 serial port header uses a non-standard numbering scheme. This was done so the header pins would have the same numbering as the corresponding DB-9 pin; i.e. pin 3 (TXD) on the header connects to pin 3 on the DB-9.|
|COM2 Header||DB9 Connector||RS-232||Half Duplex RS-485||Full Duplex RS-485|
|1||1||TX+ / RX+||TX+|
|6||6||TX+ / RX+||TX-|
Adapter cables are available to convert COM2 to a standard 9-pin SubD male connector. In addition, COM2 has optional support for full or half-duplex RS-485
|Note:||The COM2 serial port 10-pin header has both RS-232 and RS-485 signals. Only one set may be used for a given application - it is not possible to use both at the same time.|
5.5.1 Optional RS-485 Support
The COM2 Port supports RS-485 half duplex or full duplex operation. RS-485 drivers allow communications between multiple nodes up to 4000 feet (1200 meters) via twisted pair cable. Half-duplex RS-485 requires one twisted pair plus a Ground connection, while full duplex requires two twisted pair plus a Ground. For half-duplex operation, a single twisted pair is used for transmitting and receiving.
The ioctl Linux system call is used to initialize the automatic RS-485 control logic. For full-duplex operation, two twisted pairs are used and the transmit driver is typically enabled all the time. Fail-safe bias resistors are used to bias the TX+, TX- and RX+, RX- lines to the correct state when these lines are not being actively driven. In a typical RS-485 installation, the RS-485 drivers are frequently "tri-stated." If fail-safe bias resistors are not present, the RS-485 bus may "float" and small amounts of noise can cause spurious characters at the receivers. 4.7K Ohm resistors are used to pull the TX+ and RX+ signals to 5V and also to bias the TX- and RX- signals to ground.
Termination resistors in many installations are not required when cable lengths are less than 50 meters and the baud rate is 9600 or less. Termination resistors may be required for reliable operation when running longer distances or at higher baud rates. Termination resistors (typically 100-150 ohms) should only be installed at each end of an RS-485 transmission line. In a multi-drop application where there are several drivers and/or receivers attached, only the devices at each end of the transmission line pair should have termination resistors.
A read at I/O location 0x2240_0000 bit 1 will return a "1" when the RS-485 option is installed.
|Note:||A special ioctl command has been added to the TS-Kernel's serial code to turn off and on the automatic RS-485 feature. Refer to the Linux for TS-ARM User's Guide for additional software information on RS-485 support.|
5.5.2 RS-485 Quick-Start Procedure
Perform the following steps:
- Check that the RS-485 option is installed in the TS-7260 (required).
- Attach the RS-485 cable to the 10-pin header. (Adapter cables to SubDB9 connector are available from Technologic Systems).
- Set the COM2 UART serial parameters (baud rate, data, parity, and stop bits, interrupts, etc) in your source code.
- Use the TIOC_SBC's485 ioctl() to enable the automatic RS-485 feature.
- Simply read() and write() data to the COM2 UART - the automatic RS-485 logic controls TX enable.
5.5.3 Automatic RS-485 TX Enable
The TS-7260 supports fully automatic TX enable control under hardware control. This simplifies the design of half-duplex systems since turning off the transmitter and enabling the receiver in software is typically difficult to implement. If this is implemented in software, then the COM2 UART transmit holding register and the transmit shift register both must be polled until empty before deasserting the TX enable signal to the RS-485 driver. The design gets more complicated when using the TX FIFO or when using a multi-tasking OS such as Linux.
The implementation on the TS-7260 uses hardware to automatically control when the RS-485 drivers and receivers are selected. The automatic RS-485 logic eliminates the need for any software polling and supervision. This circuit automatically turns on/off the RS-485 transceiver and receiver at the correct times. This only requires the COM2 Mode registers to be initialized once based on baud rate and data format.
|0x04||1||0||0||Half-Duplex 9600 Baud|
COM2 will default to RS-232 mode at reset (COM2 mode register = Hex 00). In order to switch COM2 into Full duplex RS-485 mode, the COM2 Mode register at 0x22C0_0000 must be set to Hex 01. In this mode, the TX drivers are always asserted.
In order to switch COM2 into half-duplex RS-485, then the COM2 mode register at 0x22C0_0000 must be set to Hex 04, 05, 06 or 07 depending upon the baud rate required. A second COM2 Mode register at 0x2300_0000 must be set to Hex 01 if the COM2 is in half-duplex mode and the data format is using 8 data bits with parity or 8 data bits with 2 stop bits.
|Note:||COM2 in half-duplex RS-485 supports baud rates of 9600, 19.2K, 57.6K and 115.2K. If you need to operate at any other baud rate, then please contact Technologic Systems.|
5.6 COM3 Header
In the default TS-7260 configuration (OP-2TTLCOM not selected), the COM3 port has RS-232 signal levels, utilizes RTS and CTS signals and is accessible on a 10-pin header labeled COM3:
The COM3 serial port is implemented at address 0x12400000. It has a 5-byte receive FIFO and a 1-byte transmit FIFO. A TS-Kernel serial driver, "tsuart" is available which allows manipulation of this hardware in Linux using the device node /dev/ttyTS0. The 5- byte receive FIFO is enough to prevent buffer overflow at 115200 baud with the Linux driver; however, it is recommended that user designs first utilize using COM1 or COM2 ports with 16-byte FIFOs at these high speeds
|0x0||STAT register||Bit 7-5: MODE, baud rate (RW)|
|Bit 4: RTS, UART request-to-send (RW)|
|Bit 3: CTS, UART clear-to-send (RO)|
|Bit 2: OERR, Overflow error (RO)|
|Bit 1: DR, Receive data ready (RO)|
|Bit 0: TBRE, Transmit buffer empty (RO)|
|Bits represent RX data|
|Bits represent TX data|
|1||1||1||UART off, IRQ disabled|
The UART will interrupt the CPU while there is data in the RX fifo and on the rising edge of the TBRE bit. (full -> empty transition). The IRQ is cleared on read of the STAT register. If the TS-7260 is ordered with the OP-2TTLCOM Option, the COM3 port assumes TTL level signals and only the RXD and TXD signals will be used. It is sufficient to interface with serial devices that only require transmit and receive data lines. With the OP- 2TTLCOM selected, the COM3 signals are available at the DIO2 header, as shown in the following table.
5.7 DIO1 Header
The DIO1 Header provides +3.3V, GND, and 9 digital I/O lines that may be used to interface the TS-7260 with a wide range of external devices. DIO lines DIO_0 thru DIO_7 are a byte-wide port using Port B on the EP9302 and are accessed via the data register at address location 0x8084_0004. The DDR for this port is at address location 0x8084_0014.
|DIO1 Pin||Default Signal|
DIO_8 is accessed via bit 1 of Port F in the EP9302. The Port F data register is at address location 0x8084_0030. The DDR address for this port is location 0x8084_0034.
The Pin 4 of the DIO1 Header, in the default configuration, is accessed via bit 0 of Port C in the EP9302. The address location 0x8084_0008 is Port C Data Register and 0x8084_0018 is Port C Directon Register.
When accessing these registers, it is important not to change the other bit positions in these Port F registers. Other DIO1 Port functionality, used for dedicated TS-7260 functions, utilize these same control registers. All accesses to these registers should use read-modify-write cycles.
|WARNING:||All pins on the DIO header use 0-3.3V logic levels. Do not drive these lines to 5V.|
When the DIO pins are configured as outputs, they can "source" 4 mA or "sink" 8 mA and have logic swings between GND and 3.3V. When configured as inputs, they have standard TTL level thresholds and must not be driven below 0 Volts or above 3.3 Volts. DIO lines DIO_0 thru DIO_3 have 4.7K Ohm "pull-up" resistors to 3.3V biasing these signals to a logic"1". The other DIO pins have 100K Ohm bias resistors biasing these inputs to a logic "1".
5.7.1 SPI Interface
The EP9302 Synchronous Serial Port is available on the DIO1 header. This port can implement either a master or slave interface to peripheral devices that have either Motorola SPI, or National Semiconductor Microwire serial interfaces.
The transmit and receive data paths are buffered with internal FIFO memories allowing up to eight 16-bit values to be stored for both transmit and receive modes. The clock rate is programmable up to 3.7 MHz and has programmable phase and polarity. The data frame size is programmable from 4 to 16 bits.
By using some of the DIO1 Header pins as peripheral Chip Select signals, a complete interface is available for addressing up to 9 SPI peripherals. The SPI bus pins are defined in the table below:
|10||SPI_MISO||Master In/Slave Out|
|12||SPI_MOSI||Master Out/Slave In|
|6||SPI_Frame||SPI Frame pin|
A fourth SPI bus function [SPI_Frame] is available by adding a 10 ohm resistor in the position labeled R1 on TS-7260. This signal is not required for many SPI peripherals but it may prove useful in some applications.
|WARNING:||The SPI bus pins use 0-3.3V logic levels. Do not drive these lines to 5V.|
Refer to the EP9301 User's Guide and see Chapter 19 for more details on using SPI bus.
5.7.2 Matrix Keypad
DIO signals DIO_0 thru DIO_7 are physically arranged to allow a 16-pin (2x8) ribbon cable to directly connect a 4x4 matrix keypad. Sample code is available for the Matrix Keypad. Contact Technologic Systems for further information.
5.8 DIO2 Header
The DIO2 Header provides +3.3V, GND, and 10 digital I/O lines that may be used to interface the TS-7260 with a wide range of external devices.
When the DIO2 pins are configured as outputs, they can "source" 4 mA or "sink" 8 mA and have logic swings between GND and 3.3V. When configured as inputs, they have standard TTL level thresholds and must not be driven below 0 Volts or above 3.3 Volts.
|Pin||Signal||TS-7260 Primary Function||Alternate Signal||Alternate Function|
|9||XDIO_4||XDIO_4 - PWM/
One Shot Output -
Quadrature Index Count
|11||XDIO_5||XDIO_5 - Quadrature A||RXD||COM5|
|13||XDIO_6||XDIO_6 - Quadrature B||TX Frame||COM4|
|15||XDIO_7||XDIO_7 - Edge Counter/
When the additional 4th and 5th UART ports option is not selected, the DIO2 Header pins dedicated to COM4 and COM5 are GPIO pins, which implement basic digital input/output function. This means that a standard test cable can still be used to test the pins. There is a Digital IO capability implemented at 0x12C0_0000. The following register map describes the behavior of this feature:
|0x0||Data Register||1 - Pin at logic high|
0 - logic low
|0x1||Data Direction Register||1 - output|
0 - input
Bits X of each register corresponds to pin (X*2+1) on the DIO2 header. Pin 14 on the DIO2 header is another GPIO pin implemented in the CPLD. The data direction register for this GPIO pin is bit 1 and the data register for this GPIO pin is bit 2 at location 0x2140_0000.
|WARNING:||All pins on the DIO2 header use 0-3.3V logic levels. Do not drive these lines to 5V.|
5.8.1 Optional COM4 and COM5
With the incorporation of Technologic Systems option OP-2TTLCOM, two additional onboard serial communication ports are available. However, the TS-7260 standard TS-XDIO features are negated.
Note that the interfacing signal levels are TTL compatible, not RS-232. COM4 and COM5 TX Frame signals provide an envelope representing serial data transmitted on the respective port from the TS-7260.
If the board was built with the OP-2TTLCOM option, the 4th and 5th COM ports appear at addresses 0x1300_0000 (COM4) and 0x1340_0000 (COM5). They use the DIO2 header pins as shown below:
|13||COM4 TX Frame|
|15||COM5 TX Frame|
5.8.2 Optional SD-Card Socket
When the TS-7260 is built with the OP-SDSOCKET option, the DIO2 header signals will become the SD Card core signals. Therefore, both the TS-XDIO and the extra COM4/COM5 functions are lost. This is done because there is not enough physical space available in the on-board CPLD for the different cores to be programmed simultaneously.
5.8.3 Cirrus 5 Channel A/D Converter
The Cirrus EP9302 features a 5 channel, 12-bit Analog to Digital Converter with an analog multiplexer, having an input range of 0 to 3.3 V. The Cirrus A/D converter can do a maximum of 925 samples per second, and requires a settling time of 2 milliseconds between channel switches.
On the TS-7260, three of the five available inputs are utilized to monitor board voltages, under software control. The remaining two channels are available for user signals. The monitored voltages are shown in the table below:
|ADC Channel||On-board Signal||Channel Address|
|1||1.8 VDC Core Voltage||0x0000_0680|
|2||User Input 0 ADC #2||0x0000_0620|
|3||5.0 VDC Input Voltage||0x0000_0640|
|4||User Input 1 ADC #4||0x0000_0610|
Software may access these monitored signals by executing an A/D conversion on the specified channel. The DIO2 Port pins are shown in the next table. They are connected to two of the EP9302 12-bit A/D converter inputs. These can be used to measure analog signals in the range of 0 to 3.3V.
|DIO2 Pin||ADC Input Channel|
|8||User Input 0|
|10||User Input 1|
To maintain 12-bit accuracy, the analog signal being measured must have a low source impedance (less than 10 ohms). Otherwise, an operational amplifier may need to be added to buffer the A/D input. For detailed information, please see the Cirrus EP9301 User's Guide, page 518.
The following steps outline the software execution to use the Cirrus A/D converter:
- Unlock the software lock before setting the TSEN bit in the ADCClk register by writing 0xAA to the ADCSWLock register (0x8090_00C0). "OR" in the TSEN bit (bit 31) to the ADCClkDiv register (0x8093_0090)
- Unlock the software lock (again) before OR'ing in the ADCEN (ADC clock enable, bit 31) to 0x8093_0080
- Clear bit 2, the ADCPD (ADC Power Down) bit, at 0x8093_0080. This bit MUST be set to 0 (see page 91 of the EP9301 User's Guide)
- After unlocking the software lock, write the channel's magic value (see Cirrus EP9301 User's Guide, table 20-2) to the ADCSwitch register (0x8090_0018) to select that channel for the next data acquisition
- Poll the ADC Result register (0x8090_0008) until bit 31 is not set
- Using a 32 bit read operation, read the result from 0x8090_0008, masking off the upper 16 bits
5.8.4 Interpreting Cirrus A/D Converter
The Cirrus on-chip A/D converter is a successive approximation A/D converter. Each A/D channel is calibrated on the TS-7260 and these 16-bit values are stored in non-volatile EEPROM. These calibration values minimize the offset errors and gain errors in the EP9302 A/D. It is important for the user program to use these values as per our sample code, which can be found either on our website or in the CD included in the Developer's Kit. Two reference points, 0 and 2.5 Volts, with the corresponding reference values stored in EEPROM. Bytes 0x07EB through 0x07FE of the EEPROM hold a two dimensional array:
[channel number][0V ref. point, 2.5V ref. Point]
The reference points are stored as a 16 bit value, and should be used to correlate the values returned by the Cirrus A/D converter to voltage.
5.8.5 External Reset/Shutdown Control
Two signals are available on the DIO2 Header to control the TS-7260 Shutdown and Reset. These signals are TTL compatible and use negative logic. The reset process using the DIO2 Header causes a full-system reset, exactly the same as if the power were cycled.
The following is a description of the TS-XDIO port on the TS-7260. This core is designed to implement common controller tasks that are difficult, costly (CPU intensive), or impossible to accomplish in software with regular DIO / GPIO hardware and the facilities of the 200Mhz ARM processor. The TS-XDIO core appears at address locations 0x12c00000-0x12c00003 on the TS-7260 boards and uses ARM IRQ 32 (IRQ 6). The 2 available clock sources are the 14.7456 Mhz fast clock (68ns of period) and the 32.7680 Khz slow clock (30518ns of period). TS-XDIO are not intended to provide device drive strengths, however they are able to source 24mA of current. The following is the pin-out for the TS-XDIO port on DIO2 header:
TS-XDIO port features includes:
- 8-pins, individually programmable as schmitt-trigger inputs, outputs, or special functions (3.3V levels)
- glitch-detector (all XDIO) to catch edges/pulses as short as one fast clock period without continuous software polling
- edge-counter/frequency meter (XD_7) max incoming clock period of one-half the core clock frequency
- quadrature counter (XD_6, XD_7) with max increment / decrement rate of one-half the maximum edge-counter frequency
- XDIO 5 can optionally be used as an index pulse for reseting the edge counter or quadrature counter to 0
- PWM (pulse width modulation) output on XDIO 4 with period between two fast clock periods and 8190 slow clock periods, with 0.02% duty cycle precision
- One-shot programmable high or low output pulse (XDIO 5) of duration between one fast clock period and 4095 slow clock periods
- pulse / period timer (any XDIO) can measure high/low pulse time or full period lengths at fast clock period resolution
The TS-XDIO functionality can be controlled through 4 control/status registers that appear at physical memory. The register 0 is used to set the XDIO mode and general configuration:
|Note:||Pin 14 on the DIO2 header is not usable as standard GPIO. It is tied to the SD card Write Protect pin.|
|Bits||Function||Binary Values and Description|
|Bits 7-6||MODE (selects what registers 1-3 are)||00 - pin direction, data register, IRQ/DRQ control|
|01 - edge / quadrature counter and glitch monitor|
|10 - input pulse timer and pin select|
|11 - PWM / pulse high / low-time set|
|Bits 5-4||Pulse timer mode and polarity||00 - negedge to posedge (low pulse time)|
|01 - posedge to negedge (high pulse time)|
|10 - negedge to negedge (period time)|
|11 - posedge to posedge (period time)|
|Bit 3||pulse timer reset (W) or waiting for trailing edge (R)|
|Bit 2||Quadrature/Edge||quadrature enable / edge counter disable|
|Bit 1||PWM||PWM enable / pulse start|
|Bit 0||Clock select||clock select (0 - fast clock, 1 - slow clock)|
Registers 1-3 are dependent upon the mode set on Bits 7-6 of Register 0. The table below describes the remaining XDIO registers:
|Register||Bits||Function and Description|
|Reg #1||DIO direction register (1 output, 0 input)|
|Reg #2||DIO data register|
|Reg #3||bit 0||irq/drq on quadrature change direction|
|bit 1||irq/drq on quadrature / edge overflow / underflow|
|bit 2||irq/drq on pin glitch (pins 0-3)|
|bit 3||irq/drq on pin glitch (pins 4-7)|
|bit 4||irq/drq on pulse timer trailing edge|
|bit 5||irq/drq on quadrature / edge counter index pulse (if enabled)|
|bit 6||reserved (may be used in customer specific TS-XDIO cores)|
|bit 7||drq select (1 drq, 0 irq)|
|Register||Bits||Function and Description|
|Reg #1||Glitch monitor, read or write resets all to 0|
|bit 7||enable index pulse on pin 5|
|bits 6-0||1 - glitch detected on pin|
0 - inactive since last read
|Reg #2||bits 7-0||bits 7-0 of edge / quadrature counter|
|Reg #3||bits 7-0||bits 15-8 of edge / quadrature counter|
|Register||Bits||Function and Description|
|Reg #1||Pin select / timer|
|bit 7||pulse time accumulate - keeps on running adding pulse times|
|bits 6-4||input pin number (0-7)|
|bits 3-0||bits 19-16 of pulse timer|
|Reg #2||bits 7-0||bits 7-0 of pulse timer|
|Reg #3||bits 7-0||bits 15-8 of pulse timer|
|Register||Bits||Function and Description|
|Reg #1||bits 7-4||bits 11-8 of high time|
|bits 3-0||bits 11-8 of low time|
|Reg #2||bits 7-0||bits 7-0 of high time|
|Reg #3||bits 7-0||bits 7-0 of low time, one-shot mode enabled if all zeros|
5.8.7 TS-XDIO Programming Considerations
- If quadrature index pulse is enabled, counter is reset on positive edge of index pulse if DIO Data Register, bit 5 is set to 0, negative edge if set to 1.
- Pulse width modulation (PWM) time is 2 + high / low time clock periods of 14.7456 MHz or 32 KHz.
- If using Pulse Width Modulation (PWM) in "One shot" mode (single pulse), Type is high pulse (low-high-low) if DIO Data Register, bit 4 is set to 0, low pulse (high-low-high) if set to 1.
- One could use the 20-bit Pulse Timer as a free-running timer by setting the Accumulate bit and setting pin select to PWM output (pin 5). 14.7456 MHz counter can be enabled by "watching periods," slower free-running counters can be had by clever use of hightime and low-time PWM and accumulating pulse times. (e.g. high-time 1, low-time 224 creates a 65.536Khz free-running timer that overflows once every 16 seconds).
- Edge counter counts both edges of a waveform; divide by 2 for number of periods / frequency. To count X edges and then interrupt, pre-load counter value with 2^16 - X and enable IRQ on overflow.
- Max/min quadrature can be counted by enabling IRQ / DRQ on quadrature change of direction. Max / Min is value +/- 1 as long as IRQ / DRQ latency is less than 1 quadrature cycle time.
- The XDIO Core does not reset -- registers and state remain if board undergoes a reset.
- Upon power-up, DIO Data Direction Register is all 0's (inputs), but other register contents are undefined
|Note:||Technologic Systems provides C API, source code and examples for TS-XDIO programming. Visit the TS-XDIO webpage for more details.|
5.9 LCD Header
The LCD Port can be used to interface to a standard alphanumeric LCD display or as 11 additional digital I/O lines. The header has been arranged to allow a 14-pin ribbon cable to directly connect to industry standard LCD displays.
Technologic Systems has a 2x24 LCD display available with software drivers for rapid development.
DIO lines LCD_0 thru LCD_7 are a byte-wide port using Port A on the EP9302 and are accessed via the data register at physical address location 0x8084_0000. The DDR for this port is at 0x8084_0010. Because this port is interfacing to a 5V LCD, 1.0K Ohm resistors have been added in series between the EP9302 and the LCD_0 thru LCD_7 pins. This is required since the LCD data bus could be driving these lines above 3.3V. The series resistors prevent the LCD from overdriving the EP9302 Port A pins. If using these pins for general purpose DIO, the current sourcing and sinking capability of these DIO pins is limited by the 1.0K Ohm resistors.
LCD_EN, LCD_RS, and LCD_WR are DIO pins using EP9302 Port H bits 3 through 5 respectively and are accessed via the data register at physical address location 0x8084_0040. The DDR for this port is at 0x8084_0044. When these DIO pins are configured as outputs, they can source 4 mA or sink 8 mA and have logic swings between 3.3V and ground. When configured as inputs, they have standard TTL level thresholds and must not be driven below 0 Volts or above 3.3 Volts. These DIO pins have 100K Ohm bias resistors biasing these inputs to a logic "1". It is important not to change the other bit positions in these Port H registers since the other DIO pins are being used on the TS- 7260. All accesses to these registers should use read-modify-write cycles. Pin 4 on this header (labeled Bias) is a 620 Ohm resistor to ground for LCD contrast biasing. The 5V power on the LCD header has a 750 mA Poly-Fuse to limit the current.
|WARNING:||LCD pins 3, 5, and 6 use 0-3.3V logic levels. Do not drive these lines to 5V.|
5.9.1 LCD Interface
A 14-pin LCD connector is provided for interfacing with standard alphanumeric LCD displays. These displays use a common controller, the Hitachi HD44780 or equivalent. While software written for the HD44780 works with all displays using the controller, the cable needed is dependent on the display used.
For most displays, a straight-through type ribbon cable can be used. The connector on the LCD display is typically mounted on the backside of the display.
|1||LCD 5V||LCD Power|
|4||Bias||620 Ohm to GND|
|5||LCD_EN||Active high enable|
|6||LCD_WR#||Active low write|
|7||LCD_D1||D0 - D7:|
Note that the pin-outs in the above table are not the standard given for LCD displays. However, these pin-outs allow a standard ribbon cable to be used when the ribbon cable is attached to the backside of the LCD.
|WARNING:||Using an incorrect cable or mounting the LCD connector on the front-side can result in a reverse power polarity and can damage the LCD display. Please refer to your LCD data sheets for in-depth information.|
Sample code is available for the LCD. Contact Technologic Systems for more information.
5.9.2 JTAG Header
The JTAG header can be used to program the on-board CPLD using special software and hardware support tools. However, it is not available for application debug purposes since it has no connection to the EP9302 JTAG interface. The following table shows which pins of the JTAG header are used for the JTAG interface signals:
|11||TDI||Test Data In|
|13||TMS||Test Mode Select|
|14||TDO||Test Data Out|
|1, 3, 5||3.3 VCC||Power Supply|
The JTAG header is also utilized for jumper configuration. See the Jumpers section of this manual for more details.
Technologic Systems has made the design choice to save on board real-estate and not bring out the JTAG header. If you need access to the JTAG pins, a skilled technician can solder wires to the pins.
5.10 Power Supply Header
A quick release screw-down terminal block for the input power and GND connections are provided for easy connection to an external power supply.
An unregulated or regulated 4.5 - 20 VDC power supply, preferably with current limiting to less than 4 Amps may be used. A current limited supply is recommended.
5.10.1 Power Management
The TS-7260 incorporates software controlled power features making it useful in applications requiring battery power or where power consumption is an issue. Figure 5 is a block diagram illustrating this control.
|Note:||JP 7 can only be installed if the input power is regulated 5 VDC.|
The software control of these peripherals and other power savings are defined below through the register definition of the TS-7260 specific 8-bit register at address, 0x1200_0000:
|Bit 0||RS232 level converter power (1 - on, 0 - off)|
|Bit 1||USB 5V power|
|Bit 2||LCD header 5V power|
|Bit 3||5V switcher enable (only setable if JP7 OFF)|
|Bit 4||PC104 clock disable (1 - clock disabled)|
|Bit 5||PC104 fast strobes (1 - enabled)|
|Bit 6||TTL uart enable (1 - COM3 switched to TTL on DIO3 header)|
|Bit 7||Scratch register (retains state during reboots)|
The 5V switcher will default to on, '1,' if the board is powered up with JP7 off. If the board is powered up with JP7 on, this bit is '0'. Changing this bit during normal operation is not recommended.
The Scratch Register is intended to be used by Watchdog software to determine if last reboot was the result of watchdog expiry (value '1'), or normal system reboot/power-on (value '0').
The PC104 Fast Strobes Bit allows for non-ISA compatibility, but much faster bus cycle timing for custom boards. Contact Technologic Systems for more information. This bit should remain '0' for normal PC104 bus operation.
When the TTL UART Enable bit is set, COM3 RS232 signals RX and TX on the COM3 header are ignored and instead appear on pins 1 (TX) and 3 (RX) on the DIO2 header as 3.3V TTL signals. See section COM3 header for more information. This will override any settings for those pins in the DIO registers.
The least significant three bits of Model Register address, 0x22000000 are '010' (decimal 2 - TS-7260 unique code).
Bit 0 of the Options Register refers to the state of OP-2TTLCOM (5 UART option) is inplace with (1), or TS-XDIO option (0).
6 PC/104 Bus Expansion
The PC/104 is a compact implementation of the PC/AT ISA bus ideal for embedded applications. Designers benefit from an established industry standard bus that already has well-developed documentation and many compatible peripherals available in the market place. The presence of a compact form-factor PC compatible standard has encouraged the development of a broad array of off-the-shelf products, allowing a very quick time to market for new products.
The electrical specification for the PC/104 expansion bus is identical to the PC ISA bus. The mechanical specification allows for the very compact implementation of the ISA bus tailor made for embedded systems. The full PC/104 specification is available from the IEEE Standards Office, No. IEEE P996.1.
This bus allows multiple peripheral boards to be added in a self-stacking bus. Since the electrical specs are identical (except for drive levels) to a standard PC ISA bus, standard peripherals such as COM ports, Digital I/O, Ethernet ports, and LCD drivers may be easily added.
|WARNING:||The TS-7260 implements a sub-set of the full PC/104 bus. This allows the support of many common I/O peripheral boards. Some of the PC/104 signals are not supported; for example, the DMA signals. These pins are used on the TS-7260 to support data lines D8- D15. This means that a full 16-bit data bus implementation of the PC/104 bus is possible by only using the 64-pin connector. The supplemental 40-pin connector is not an available option for the TS-7260 - any new design can implement a full 16-bit data bus with only the 64-pin connector.|
PC/104 peripherals will appear in the TS-7260's physical address space in one of four address regions depending upon whether it is emulating an x86 Memory cycle or I/O cycle and whether it needs to be a 8-bit cycle or a 16-bit cycle. Each region is a full 1MB in size, even though the I/O region will typically only use a 1 Kbyte region for legacy products.
|Physical Address Region||Emulates x86 Cycle|
|11E0_0000 thru 11E0_03FF||8-bit I/O cycles|
|21E0_0000 thru 21E0_03FE||16-bit I/O cycles|
|11A0_0000 thru 11AF_FFFF||8-bit Memory cycles|
|21A0_0000 thru 21AF_FFFE||16-bit Memory cycles|
I/O cycles on the PC/104 expansion bus strobe either IOR# or IOW#, while Memory cycles strobe the MEMR# or MEMW# signals. For example, a TS-SER1 peripheral board can be jumper-selected as COM3, which would correspond to a PC I/O base address of 0x3E8. Since this is an 8-bit peripheral, this COM port must be accessed at the physical base address of 0x11E0_03E8.
|A3||Data 6||B3||+5 V|
|A4||Data 5||B4||Data 8*|
|A17||Address 14||B17||Data 9*|
|A18||Address 13||B18||Data 10*|
|A19||Address 12||B19||Address 21*|
|A20||Address 11||B20||Data 12*|
|A25||Address 06||B25||Data 11*|
|A26||Address 05||B26||Data 13*|
|A27||Address 04||B27||Data 14*|
|A28||Address 03||B28||Data 15*|
|A30||Address 01||B30||Osc (14.3 MHz)|
|* These signals have a non-standard usage.|
6.1 Adding Serial Ports
If your project requires more than the included TS-7260's serial ports, additional ports may be added via the PC/104 expansion bus. Technologic Systems offers three different peripheral boards (TS-SER1, TS-SER2, and TS-SER4) that add 1, 2, or 4 extra COM ports respectively. These can be configured using PC designations COM1, COM2, or higher.
These ports will appear in the PC/104 8-bit IO address space (0x11E0_0000 base address). For example, a TS-SER1 peripheral board can be jumper selected as COM4, which would correspond to a PC I/O base address of 0x2E8. On the TS-7260, this COM port will appear at the physical base address of 0x11E0_02E8. The PC/104 Expansion Bus has IRQ5, IRQ6, and IRQ7 available for additional serial port interrupts.
Typically each serial port has a dedicated interrupt, but the TS-SER4 peripheral board allows all four extra serial ports to share a single interrupt. This is very helpful in systems with a large number of serial ports since there are a limited number of IRQ lines available.
Drivers are available in the TS-Kernel to support these extra COM ports.
6.2 Adding Ethernet Ports
Additional ethernet ports can be added to the TS-7260 using appropriate PC/104 hardware provided by Technologic Systems, allowing the implementation of hardware and software applications such as network firewalls, gateways or routers.
The TS-ETH10 is a 10Mb ethernet PC/104 card based on the CS8900 ethernet chip that is perfectly suited for a WAN uplink. Up to 4 TS-ETH10 cards can be stacked on the PC/104 connector since the add-on board has 4 separate address decodes. TS-ETH0 driver is available for TS-Kernel. Documentation and support is provided by us as well.
6.3 Adding CAN Bus
Controller Area Network (CAN) is a serial network primarily used in embedded systems that was originally designed for the automotive industry, but has also become a popular bus in industrial automation and other applications. The addition of a CAN bus to the TS-7260 is easily accomplished by the optional TS-CAN1 board through the PC/104 bus.
The TS-CAN1 provides one single channel CAN interface and enables a PC/104 embedded systems to be connected to CAN1.1 and CAN2.0a networks. It uses a Philips SJA1000 CAN controller which is opto-isolated from the physical CAN network, increasing the system security. Up to four boards can be installed in any single system. The Philips SJA1000 CAN controller can also be found at Technologic Systems TS-7KV multi-function video board.
Technologic Systems provides complete SJA1000 Linux driver support for TS-CAN1 and TS-7KV, including CANOpen high level protocol. Documentation and support for CAN application development are also provided.
6.4 Adding Video Support
The TS-7KV multi-function PC/104 peripheral board can be added to the TS-7260 if your application needs a video solution, . The TS-7KV implements the TS-VIDCORE using an FPGA solution to deliver 16-bit color, 640X480 resolution video, 8MB dedicated video memory running at 95Mhz, and a simple fast video accelerator. The TS-7KV includes a standard DB15 VGA connector and a 10 pin header. Regarding software support, an accelerated Linux framebuffer driver is available for TS-Kernel. In addition, the QT/Embedded graphical library can be used with the video solution and compiled packages can be found at Technologic Systems website.
The TS-VIDCORE included on the FPGA is a unique video core specifically designed in tandem with the Linux framebuffer driver. Hardware accelerations were implemented and designed to mesh well with the capabilities of the Linux 2.4 frame buffer device driver API. Technologic Systems engineers carefully chose which functionality was implemented in hardware, which functionality was left out for software and which functionality was hard-coded in the bitstream. The result is a higher speed design that is technically elegant and simple in good embedded systems fashion. The TS-7KV has dedicated video memory which allows CPU throughput and real-time response to remain fast and predictable, a clear advantage over devices which share system memory.
The TS-7260 SBC has on-board VGA video functionally integrated on the FPGA, using the same TS-VIDCORE used on TS-7KV.
|WARNING:||When running Linux and using a TS-7KV video board, a USB mouse and a USB keyboard, it is possible to use the TS-7260 embedded system as a desktop-like system, independent of the host machine. TS-Kernel provides the complete solution for automatic configuration during boot time and console output at the plugged monitor. Contact Technologic Systems for further information.|
7 LEDs, Jumpers, and Buttons
7.1 Status LEDs
The TS-7260 has two LEDs (one Red and one Green) available for user software. These LEDs may be used for diagnostics, status messages, and simple output. When power is first supplied to the TS-7260, both LEDs are immediately turned on under hardware control. Once the processor begins execution, the LEDs are turned off, and then flashed on and off again briefly. After booting is complete, these LEDs can be used for user applications.
The RED and Green LEDs can be controlled at physical address location 0x8084_0020. Bit 1 is the Red LED and bit 0 is the Green LED. A Logic "1" turns the LED on.
The TS-7260 contains six default jumpers for specific board configuration:
|JP1||Boot to Serial Port COM1. This is a recovery mechanism that allows the TS-7260 to boot using COM1 instead of the on-board Flash chip.|
|JP2||Enable Serial Console. COM1 is used as the Console. (If JP4 is not installed). When removed VGA output is the default console.|
|JP3||Write Enable Flash. Remove this jumper to write protect the Flash drive.|
|JP4||Console swapped to COM2 (Requires JP2 installed to enable console).|
|NC||No Connection (unlabeled).|
The TS-7260 model contains three additional jumpers for specific board configuration on power management:
|JP7||Power In to + 5.0 VDC Bus. This Jumper should only be added if the board is using a regulated 5.0 VDC power supply and the application calls for the bussing of the internal and external power supplies.|
|JP8||Power In to +12 VDC PC/104 Power. This jumper should only be added if the power in to the board is a regulated +12 VDC power supply and the application calls for "passing" the power to the PC/104 Expansion Bus|
|JP9||Power to the Ethernet LED.|
Jumpers 2, 3, 4, and 5 can be read at physical address location 0x1080_0000. The status of all jumpers is available to software through the physical memory as describes the table below:
|Address||JP and Bit||On/Off|
|0x1080_0000||JP2 is bit 0||Logic "1" = Jumper ON|
|0x1080_0000||JP3 is bit 1||Logic "1" = Jumper ON|
|0x1080_0000||JP4 is bit 3||Logic "0" = Jumper ON|
|0x1080_0000||JP5 is bit 4||Logic "0" = Jumper ON|
|0x2280_0000||JP6 is bit 0||Logic "1" = Jumper ON|
On the TS-7260 model, the reset push-button is replaced by pins 4 and 2 of the DIO1 Header. Refer to the DIO1 Header section to further information about the reset and shutdown process.
8 Environmental Specifications
To ensure optimum product operation you must maintain the operational environmental specifications listed in the table below.
|Environmental Specification||Standard Temp||Extended Temp|
|Ambient Temperature||-20° to +70° C
The internal temperature must not exceed +70° C.
|-40° to +85° C|
Extended temperature range is also standard in our TS-7260 product
Extended Temp requires lower CPU speed (<=166Mhz) at higher temperatures
Refer to your product manual, or contact Technologic Systems if the environmental temperature of the location is in doubt.
|Relative Humidity||0 to 90% relative humidity. Not to exceed 90% non-condensing.||Not to exceed 90% non- condensing.|
9 Memory and Register Map
|0xF000_0000 - 0xFFFF_FFFF||nCS0 (not used)|
|0xE000_0000 - 0xEFFF_FFFF||SDRAM (TS-7250)|
|0xD000_0000 - 0xDFFF_FFFF||SDRAM (not used)|
|0xC000_0000 - 0xCFFF_FFFF||SDRAM (not used)|
|0x8084_0000 - 0x8084_00C8||GPIO control registers|
|0x8000_0000 - 0x800F_FFFF||AHB mapped registers|
|0x71C0_0000 - 0x71FF_FFFF||CS7 PC/104 8/16 bit I/O (user selectable timing)|
|0x7180_0000 - 0x71BF_FFFF||CS7 PC/104 8/16 bit Memory (selectable timing)|
|0x7000_0000 - 0x70FF_FFFF||TS-9420 Flash|
|0x7000_0000 - 0x7FFF_FFFF||CS7 (bit bus cycles)|
|0x6000_0000 - 0x60FF_FFFF||on-board Flash (TS-7200)|
|0x6000_0000 - 0x6FFF_FFFF||CS6 (Flash)|
|0x3000_0000 - 0x3FFF_FFFF||CS3 (not used)|
|0x21C0_0000 - 0x21FF_FFFE||PC/104 16-bit I/O|
|0x2180_0000 - 0x21BF_FFFF||PC/104 16-bit Memory|
|0x2000_0000 - 0x2FFF_FFFF||CS2 (16-bit bus cycles)|
|0x11C0_0000 - 0x11FF_FFFF||PC/104 8-bit I/O|
|0x1180_0000 - 0x11BF_FFFF||PC/104 8-bit Memory|
|0x1000_0000 - 0x1FFF_FFFF||CS1 (8-bit bus cycles)|
|0x0001_0000 - 0x0000_FFFF||SDRAM region|
|0x8090_0020||Cirrus A/D lock register|
|0x8090_0018||Cirrus A/D channel select register|
|0x8090_0008||Cirrus A/D result register (RO)|
|0x808D_0000 - 0x808D_FFFF||UART2 control registers|
|0x808C_0000 - 0x808C_FFFF||UART1 control registers|
|0x808A_0000 - 0x808A_FFFF||SPI control registers|
|0x8084_0044||LCD_EN, LCD_RS, LCD_WR direction reg.(bits3-5)|
|0x8084_0040||LCD_EN, LCD_RS, LCD_WR data reg.(bits3-5)|
|0x8084_0034||DIO_8 direction register (bit 1)|
|0x8084_0030||DIO_8 data register (bit 1)|
|0x8084_0020||On-board LEDs register (bits 0, 1)|
|0x8084_0018||Port C direction register|
(TS-7300) LCD_7 direction register (bit 7)
|0x8084_0014||DIO_0 thru DIO_7 direction register (R/W)|
|0x8084_0010||LCD_0 thru LCD_7 direction register (R/W)|
|0x8084_0008||Port C data register|
(TS-7250) 1000 mA driver output on DIO (bit 0)
(TS-7300) LCD_7 data register (bit 7)
|0x8084_0004||DIO_0 thru DIO_7 data register (R/W)|
|0x8084_0000||LCD_0 thru LCD_7 data register (R/W)|
|0x8081_0000 - 0x8081_FFFF||Timer Control registers|
|0x8080_0000 - 0x8FFF_FFFF||APB mapped registers|
|0x800B_0000 - 0x800B_FFFF||VIC 0 registers|
|0x8006_0000 - 0x8006_FFFF||SDRAM control registers|
|0x8002_0000 - 0x8002_FFFF||USB registers|
|0x8001_0000 - 0x8001_FFFF||Ethernet MAC registers|
|0x7220_0000 - 0x729F_FFFF||(TS-7300) FPGA SDRAM region|
|0x7210_0000 - 0x7200_FFFF||(TS-7300) FPGA MAC core 32-bit registers|
|0x7200_0044 - 0x7200_0047||(TS-7300) FPGA DIO2 TS-XDIO #2 registers|
|0x7200_0040 - 0x7200_0043||(TS-7300) FPGA DIO2 TS-XDIO #1 registers|
|0x7200_0030 - 0x7200_003A||(TS-7300) FPGA Video core 16-bit registers|
|0x7200_0020 - 0x7200_0027||(TS-7300) FPGA SD Card core 16-bit registers|
|0x7200_0000 - 0x7200_001F||(TS-7300) FPGA COM3-4-5-6-7-8 16-bit registers|
|0x6000_0000||(TS-7250) NAND Flash data register|
|0x6040_0000||(TS-7250) NAND Flash control register (bits 0-2)|
|0x6080_0000||(TS-7250) NAND Flash Busy status (bit 5)|
|0x23C0_0000||WDT Feed register (bits 0-2)|
|0x2380_0000||WDT Control register (bits 0-2)|
|0x2340_0000||PLD version (bits 0-2)|
|0x2300_0000||COM2 RS-485 control register|
|0x22C0_0000||COM2 RS-485 control register (bits 0-2)|
|0x2280_0000||JP6 (bit 0)|
|0x2280_0000||Booting from TS-9420 (bit 1)|
|0x2280_0000||TS-9420 present (bit 2)|
|0x2240_0000||MAX197 A/D option present (bit 0)|
|0x2240_0000||COM2 RS-485 option present (bit 1)|
|0x2200_0000||Model Number (bits 0-2)|
|0x21E0_0000 - 0x21E0_03FE||PC/104 16-bit I/O (legacy support)|
|0x2100_0000||CF IDE 16-bit register|
|0x13C0_0000 - 0x13C0_0001||(TS-7300) FPGA loader registers|
|0x1340_0000 - 0x1340_0002||(TS-7260) Additional COM5 registers|
|0x1300_0000 - 0x1300_0002||(TS-7260) Additional COM4 registers|
|0x12C0_0000 - 0x12C0_0003||(TS-7260) DIO2 Header TS-XDIO registers|
|0x12C0_0000 - 0x12C0_0001||(TS-7260) DIO2 Header Basic DIO registers|
|0x1240_0000 - 0x1240_0002||(TS-7260) COM3 serial port registers|
|0x1200_0000||(TS-7260) Power Management register|
|0x11E0_0000 - 0x11E0_03FF||PC/104 8-bit I/O (legacy support)|
|0x11A0_0000 - 0x11AF_FFFF||PC/104 8-bit Memory (legacy support)|
|0x1170_0000||RTC R/W data register|
|0x1100_0001 - 0x1100_0007||CF IDE 8-bit registers|
|0x10F0_0000 - 0x10F0_0001||MAX197 A/D registers|
|0x1080_0000||MAX197 A/D busy bit (bit 7) (RO)|
|0x1080_0000||JP2-JP5 (bits 0,1,3,4) (RO)|
|0x1080_0000||COM1 DCD (bit 6) (RO)|
|0x1080_0000||Write Only index register|
|0x1040_0006 - 0x1040_0007||CF AUX IDE 8-bit registers|
10 Product Notes
10.1 Feedback and Update to this Manual
To help our customers make the most of our products, we are continually making additional and updated resources available on the Technologic Systems website (www.embeddedARM.com). These include manuals, application notes, programming examples, and updated software and firmware. Check in periodically to see what's new! When we are prioritizing work on these updated resources, feedback from customers (and prospective customers) is the number one influence. If you have questions, comments, or concerns about your Embedded Computer, please let us know at support@embeddedARM.com.
10.2 FCC Advisory
This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly (that is, in strict accordance with the manufacturer's instructions), may cause interference to radio and television reception. It has been type tested and found to comply with the limits for a Class A digital device in accordance with the specifications in Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which case the owner will be required to correct the interference at his own expense.
If this equipment does cause interference, which can be determined by turning the unit on and off, the user is encouraged to try the following measures to correct the interference:
Reorient the receiving antenna. Relocate the unit with respect to the receiver. Plug the unit into a different outlet so that the unit and receiver are on different branch circuits. Ensure that mounting screws and connector attachment screws are tightly secured. Ensure that good quality, shielded, and grounded cables are used for all data communications. If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The following booklets prepared by the Federal Communications Commission (FCC) may also prove helpful:
How to Identify and Resolve Radio-TV Interference Problems (Stock No. 004-000-000345-4) Interface Handbook (Stock No. 004-000-004505-7) These booklets may be purchased from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.
10.3 Limited Warranty
The manufacturer warrants this product to be in good working order for a period of one year from date of purchase. If at any time within the one-year warranty period this product should fail, the manufacturer will repair or replace the product, at its option. This limited warranty does not cover damages resulting from lightning or other power surges, abuse, misuse, or unauthorized modifications including units conformally coated by a third party. Technologic Systems' will pass through to Customer any transferable Product warranties, indemnities, and remedies provided to Technologic Systems' by the suppliers, including any warranties and indemnities for intellectual property infringement. To the extent permitted by law, Technologic Systems' makes no other warranty, express or implied, such as warranty of merchantability, fitness for purpose or non-infringement. Customer's sole remedies for breach of Technologic Systems' warranty are, at Technologic Systems' choice: (i) repair the Products; (ii) replace the Products at no cost to Customer; or (iii) credit Customer the purchase price of the Products.
|Synopsis||Writing a new kernel to RedBoot can cause non-bootable scenario requiring factory re-imaging.|
|Affected||TS-72xx with Cirrus Logic processor using RedBoot as bootloader.|
Description: Some production processes use the existing RedBoot software to write a new kernel into the Flash memory on the TS-72xx product. This software has a bug where if the write call is made without spelling out specific memory and size locations, it may choose the wrong starting address and erase part of RedBoot, causing the SBC to fail to boot on subsequent boot attempts. Relatedly, sometimes a factory bad block is within the allocated space for the kernel. This may render the allocated kernel space too small for the kernel to exist in one contiguous memory space.
Workaround: The wiki documentation has been updated with new instructions here. If there are bad blocks listed via 'fis list', then care must be taken to write the kernel into a space that does not contain a bad block, and the "vmlinux" file handle must be updated in RedBoot to point to the new starting location for the kernel on the media. If the allocated 1.5 MB space contains one or more bad blocks such that there is insufficient contiguous space for the kernel, the SBC must be sent back to Technologic Systems via RMA for a new flash chip.
10.5 Product Change Notices
10.5.1 SDHC Update for 8GB (and larger) SD Card shipments
|Synopsis||Due to material availability, the size and type of SD card shipped with some Technologic Systems products was changed from 2GB SD media to 8GB SDHC media. This change requires a driver update for all SBC using Linux kernels older than 2.6. Additionally, systems with BootROM build dates (visible in console at power on) older than 2009 will need updated firmware).|
|Class||Necessary software change.|
|Affected||All Cirrus Logic-based SBC operating with Linux kernel 2.4.|
|Status||New software available.|
Due to unavailable media, the SD media shipped from Technologic Systems is being changed from 2GB SD to 8GB SDHC. This change will necessitate a new SDHC-compatible Linux SD Card software driver.
The affected SD cards are clearly labelled 8GB (or a larger value). The new driver file MD5sum is here. The system BootROM build date is output to serial console at power up.
The new media will ship with the new driver present, however if the media requires re-imaging, a new driver will be needed. For Linux kernel version 2.4, simply replace the Linux 'sdcard.o' driver in your SD Card image (both in the initrd and the primary Debian partition) with the one located here and rename the new file to 'sdcard.o'.
For very old Cirrus Logic-based SBC, the BootROM may report build dates earlier than 2009. In these cases, the BootROM must also be updated. The instructions and accompanying utility for this action are located here.