Table of Contents
Advertisement
2.9.3. Serial Port 3
The Serial Port 3 supports Infrared, RS-232, RS-422, and RS-485 operation modes. When
assigned as Serial Port 3, the port is 100% compatible with the IBM-AT serial port in RS-232
mode.
RS-422 and RS-485 modes allow communication using differential signals through one pair
of wires (RS-485) or two (RS-422) to increase the noise immunity during data transfers.
RS-422 and RS-485 protocols offer advantages such as increased speed over longer distances
or improved reliability over similar RS-232 setups.
Signal Path
In RS-232, RS-422, and RS-485 operation modes Serial Port 3 signals are only
available through the J5 CPCI I/O connector.
In Infrared mode, signals are available through the J3 CPCI I/O connector.
Related Jumpers
W6 & W7 to connect/disconnect
RS-422/RS-485 termination resistors (see Section 3.1, Setting Jumpers)
BIOS Settings
11.3.7 Integrated Peripherals: Onboard Serial Port 3; Serial Port 3 Mode.
NOTE
Serial Port 3 is COM2
2.11
Feature Description
Advertisement
Table of Contents
