AXIOMTEK SBC82400, Руководство пользователя

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SBC82400 ISA Half-Size CPU Board Series User’s Manual
Jumpers and Connectors
21
2.4.10 Serial Port Interface: COM1 and COM2
The SBC82400 has two onboard serial ports: COM1 is RS232
and COM2 is RS-232/422/485, jumper selectable. Both ports
f5V/+12V power capability on pin 1 and pin 8,
depending on the jumper setting
2.4.10.1 RS-232 Connectors
The RS-232 pin assignment is listed on the following table.
Pin Description Pin Description
1
Data Carrier Detect (DCD)
2
Data Set Ready (DSR)
3
Receive Data (RXD)
4
Request to Send (RTS)
5 Transmit Data (TXD) 6 Clear to Send (CTS)
7 Data Terminal Ready (DTR) 8 Ring Indicator (RI)
9
Ground (GND)
10
NC
2
4
6
1
3
5
7
8
9 10
2.4.10.2 RS-422/485 Connectors
The RS-422/485 pin assignment for COM2 is listed below.
Signal Name
Pin #
R2-422 RS-485
1
TX- DATA-
2
NC
r
NC
3
TX+ DATA+
4 NC NC
5
RX+
NC
6 NC NC
7 RX-
NC
8
NC NC
9 GND GND
10
NC NC