The TS-SER4 is a PC/104 expansion card with four serial ports using the PC standard 16C550 type UARTs (with 16-byte FIFOs). All four COM ports support RS-232 levels and two of these COM ports can optionally support RS-422/ RS-485 levels.
A flexible interrupt sharing design allows for a large number of COM ports using a minimum number of interrupts. An interrupt status register allows rapid identification of the interrupt source.
This product uses a multi-layer PCB with power and ground planes to minimize noise and EMI issues. The TS-SER4 only requires a single 5V power supply.
2 Getting Started
See your SBC's PC104 section for information on the ISA 16550 driver and getting a connection to the COM device.
3 Serial Ports
The two serial ports that are labeled COM_A and COM_B support RS-232 levels only. The two serial ports labeled COM_C and COM_D support a subset of RS-232C handshakes lines that is sufficient for the vast majority of applications. In addition these two ports can optionally have RS-485/RS-422 drivers. The table below shows these ports.
4 COM/IO Selection
|Note:||JP18 is shared with the parallel port|
5 Parallel Port
The parallel port is a standard PS/2 mode bidirectional port. It can be assigned to 5 different I/O locations or disabled completely. The parallel port can use interrupts 7 and 9. To select the desired interrupt, simply install a jumper on the associated pins in the IRQ jumper block.