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SBC81613 Socket 370 All-in-One CPU Card Series User's Manual
4.11 Serial Port Interface: CN2, CN6
The serial interface onboard SBC81613 Series consists of
COM1 port (CN2) supports RS-232 and COM2 (CN6) provide
RS-232/422/485 connectivity.
4.11.1 Serial Ports IRQ Selection
SBC81613 Series uses a 10-pin connector for COM2 (CN2) and
a DB9-pin connector for COM1 (CN6). Interrupt Requests on
COM1 and COM2 are selected via IRQ4 and IRQ3 respectively.
Additionally, both ports can be enabled or disabled via BIOS
setting. Additionally, both ports can be enabled or disabled via
BIOS setting.
RS-232/422/485 PIN Assignment: CN6, CN7
CN6
D-SUB
CN7
9PIN
1
1
Data Carrier Delect(DCD)
2
6
Data Set Ready(DSR)
3
2
Receive Date(RXD)
4
7
Request to Send(RTS)
5
3
Transmit Data(TXD)
6
8
Clear to Send(CTS)
7
4
Data Terminal Ready
(DTR)
8
9
Ring Indicator(RI)
9
5
GND
10
X
NC
CN2/CN6
RS-485 Receive Data: COM2 RTS Register must be clear.
RS-485 Transmint Data: COM2 RTS Register must be set.
26
Description
RS-232
RS-422
D-SUB 9PIN
Hardware Description
RS-485
(CN7)
(CN7)
TX-
Data -
NC
NC
TX+
Data +
NC
NC
RX+
NC
NC
NC
RX-
NC
NC
NC
GND
GND
NC
NC
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