User`s manual

DIGITAL-LOGIC AG MSMP5 / P3 SEN/SEV Manual V1.6A

4.3.3 Serial Ports COM1-COM2

The serial channels are fully compatible with 16C550 UARTS. COM1 is the primary serial port, and is sup-

ported by the board's ROM-BIOS as the PC-DOS 'COM1' device. The secondary serial port is COM2; it is

supported as the 'COM2' device.

Standard: COM 1/2: SMC 37C672: 2 x 16C550 compatible serial interfaces

Serial Port Connectors COM1, COM2

Pin Signal Name Function in/out DB25 Pin

DB9 Pin

1 CD Data Carrier Detect in 8 1

2 DSR Data Set Ready in 6 6

3 RXD Receive Data in 3 2

4 RTS Request To Send out 4 7

5 TXD Transmit Data out 2 3

6 CTS Clear to Send in 5 8

7 DTR Data TerminalReady out 20 4

8 RI Ring Indicator in 22 9

9 GND Signal Ground 7 5

The serial port signals are compatible with the RS232C specifications.