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ARC-1538
2.1 ARC-1538 connector mapping
2.1.1
Serial port 1 connector (COM1)
RS-485
Signal
DATA-
DATA+
NC
NC
GND
Please set BIOS & JCOM1_SEL1
2.1.2
Serial port 2 connector (COM2)
16 ARC-1538 Quick Reference Guide
PIN PIN
Signal
1
6
NC
2
7
NC
3
8
NC
4
9
NC
5
RS-232
Signal
PIN PIN
NDCDA#
1
NRXDA
2
NTXDA
3
NDTRA#
4
GND
5
RS-422
Signal
PIN PIN
TxD-
1
TxD+
2
RxD+
3
RxD-
4
GND
5
Please set BIOS & JCOM1_SEL1
Signal
PIN PIN
NDCDB#
1
NRXDB
2
NTXDB
3
NDTRB#
4
GND
5
Signal
6
NDSRA#
7
NRTSA#
8
NCTSA#
9
NRIA#
Signal
6
NC
7
NC
8
NC
9
NC
Signal
6
NDSRB#
7
NRTSB#
8
NCTSB#
9
NRIB#
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