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Pin
31
32
33
34
35
36
37
38
39
40
COM1 and COM2
Primary (COM1) and Secondary (COM2) Serial Ports
Pin
1
2
3
4
5
6
7
8
9
Function
IRQ15
IOCS16
SA1
Reserved
SA0
SA2
HCS0
HCS1
LED
Ground
Function
DCD (Data Carrier Detect)
RX (Receive Data)
TX (Transmit Data)
DTR (Data Terminal Ready)
Ground (Signal Ground)
DSR (Data Set Ready)
RTS (Request to Send)
CTS (Clear to Send)
RI (Ring Indicator)
G586OPC
70
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