SBC81613 Socket 370 All-in-One CPU Card Series User
’
s Manual
Hardware Description
26
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
Description
CN6
CN7
D-SUB
9PIN
RS-232 RS-422
(CN7)
RS-485
(CN7)
1
1
Data Carrier Delect(DCD)
TX-
Data -
2
6
Data Set Ready(DSR)
NC
NC
3 2
Receive
Date(RXD)
TX+
Data
+
4
7
Request to Send(RTS)
NC
NC
5 3
Transmit
Data(TXD)
RX+ NC
6
8
Clear to Send(CTS)
NC
NC
7
4
Data Terminal Ready
(DTR)
RX- NC
8 9
Ring
Indicator(RI)
NC NC
9 5
GND
GND
GND
10 X
NC
NC NC
1
9
2
10
CN2/CN6 D-SUB 9PIN
RS-485 Receive Data: COM2 RTS Register must be clear.
RS-485 Transmint Data: COM2 RTS Register must be set.
