User`s manual

Functional Description 53

cPCI-3920

COM1 DB-9 Serial Port Connector (CN3-R)

Table 3-19: COM1 Serial Port Connector Pin Definition

COM2 Onboard Serial Port Connector (CN1-R)

Table 3-20: COM2 Serial Port Connector Pin Definition

Pin # RS-232

1 not used

2 RXD, Receive data

3 TXD, Transmit data

4 not used

5 GND, Ground

6 not used

7 not used

8 not used

9 not used

Pin # RS-232

1 not used

2 not used

3 RXD, Receive data

4 not used

5 TXD, Transmit data

6 not used

7 not used

8 not used

9 GND, Ground

10 NC

NOTE:

The serial ports of Intel® 3100 Chipset are not 100 percent

compatible with other 16550 standard devices. If any system or

software designer assumes that they are compatible with other

16550 standard devices and does not follow the specifications

for the Serial I/O Unit in the Intel

® 3100 Chipset Datasheet,

errors or undesired behaviors may be observed.