8
COM1 :
Internal 1~4 Port Serial Port Connectors
PIN NO.
DESCRIPTION
PIN NO.
DESCRIPTION
1
DATA CARRIER DETECT (DCD1#)
2
DATA SET READY (DSR1#)
3
RECEIVE DATA (RXD1)
4
REQUEST TO SEND (RTS1#)
5
TRANSMIT DATA (TXD1)
6
CLEAR TO SEND (CTS1#)
7
DATA TERMINAL READY (DTR1#)
8
RING INDICATOR (RI1#)
9
GND
10
GND
11
DATA CARRIER DETECT (DCD2#)
12
DATA SET READY (DSR2#)
13
RECEIVE DATA (RXD2)
14
REQUEST TO SEND (RTS2#)
15
TRANSMIT DATA (TXD2)
16
CLEAR TO SEND (CTS2#)
17
DATA TERMINAL READY (DTR2#)
18
RING INDICATOR (RI2#)
19
GND
20
GND
21
DATA CARRIER DETECT (DCD3#)
22
DATA SET READY (DSR3#)
23
RECEIVE DATA (RXD3)
24
REQUEST TO SEND (RTS3#)
25
TRANSMIT DATA (TXD3)
26
CLEAR TO SEND (CTS3#)
27
DATA TERMINAL READY (DTR3#)
28
RING INDICATOR (RI3#)
29
GND
30
GND
31
DATA CARRIER DETECT (DCD4#)
32
DATA SET READY (DSR4#)
33
RECEIVE DATA (RXD4)
34
REQUEST TO SEND (RTS4#)
35
TRANSMIT DATA (TXD4)
36
CLEAR TO SEND (CTS4#)
37
DATA TERMINAL READY (DTR4#)
38
RING INDICATOR (RI4#)
39
GND
40
GND
COM5:
External Serial Port D-sub Connector (RS-232)
PIN NO.
DESCRIPTION
1
DATA CARRIER DETECT
(DCD#)
2
RECEIVE DATA
(RXD)
3
TRANSMIT DATA
(TXD)
4
DATA TERMINAL READY
(DTR#)
5
GND
(GND)
6
DATA SET READY
(DSR#)
7
REQUEST TO SEND
(RTS#)
8
CLEAR TO SEND
(CTS#)
9
RING INDICATOR
(RI#)
