TS-4900 Booting up the board

From Technologic Systems Manuals
WARNING: Be sure to take appropriate Electrostatic Discharge (ESD) precautions. Disconnect the power source before moving, cabling, or performing any set up procedures. Inappropriate handling may cause damage to the board.

If you are using one of our off the shelf baseboards you will need to refer to that baseboard's manual here. Different baseboards use different power connectors, voltage ranges, and may have different power requirements.

The macrocontroller only requires a 5V rail from the baseboard which may be regulated from other voltage ranges. Refer to the #TS-Socket Connector section for the POWER pins. The TS-4900 draws from 0.85W to 6W depending on how idle the processor is, and if you are using a solo, dual, or quad core. A typical power supply for just the macrocontroller will allow around 1.5A@5V, but a larger power supply may be needed depending on your peripherals.

Once you have applied power to your baseboard you should look for console output. The next section of the manual provides information on getting the console connected. The first output is from U-Boot:

U-Boot 2013.10-00049-g311750c (Jul 10 2014 - 10:37:04)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
Reset cause: POR
Board: TS-4900
DRAM:  2 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
SF: Detected N25Q64 with page size 256 Bytes, erase size 4 KiB, total 8 MiB
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   using phy at 7
FEC [PRIME]
Hit any key to stop autoboot:  0 

The default U-Boot will check for USB updates, and then will check the "SD Boot" jumper. If the SD boot jumper is set, it will boot to the Linux on the SD card. If it is not set, it will boot to the eMMC.

Note: The "*** Warning - bad CRC, using default environment" can be safely ignored. If you "env save" this will use your environment on the disk, but on new boards the SPI flash is erased so it just doesn't have a modifed env saved.