The PCM-ESCC is a PC/104 dual channel, multiprotocol data communications controller based upon the Z85230 Enhanced SCC. Each serial channel is independent and capable of synchronous or asynchronous data communications with either RS-232 or optional RS-422/485 electrical levels. The module can be configured to satisfy a wide variety of serial communications applications and can be used to interface to a terminal, printer, modem, or other serial system peripherals.


  • Two independent, full-duplex serial channels
  • Asynchronous and synchronous (BISYNC, SDLC, HDLC, and CCITT-X.25) protocols supported
  • RS-232 and optional RS-485/422 electrical interface levels on both channels
  • Asynchronous mode supported with:
    • 5-, 6-, 7-, or 8-bit character lengths
    • Even, odd, or no parity generation and checking
    • 1,1.5, or 2 stop bits
    • Break, overrun and framing error detection
  • Industrial -40° to +85°C operational temperature
Serial I/O

One 2-channel UARTs (16C554)
Asychronous and Synchronous protocol support (BISYNC/SDLC/HDLC/CCITT-X.25)
4-byte transmit and 8-byte receive FIFO
RS-232 port types available for channels (optional RS-232/422/485)
Up to 7.6 Mbps data transmit rate

Bus Interface

16-bit, PC/104


+5V required, 140 mA typical


Dimensions: 3.6 x 3.8 inches (90 x 96 mm)

Operating Temperature Range

-40°C to 85°C