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FPC 8121 User's Manual
2.4
3 x Serial Ports
COM Port Connector: COM1
The connector, COM 1, is a DB-9 connector, and the following table
shows the pin assignments of this connector.
Pin
Signal Name
DCD,
Data carrier detect
1
2
RXD, Receive data
3
TXD, Transmit data
DTR,
Data
4
ready
5
GND, ground
6
DSR, Data set ready
7
RTS, Request to send
8
CTS, Clear to send
9
RI, Ring indicator
COM Port Connectors:
The RS-232 pin assignments are listed on the following
table.
Pin
Desc ription
Data Carri er Detect
1
(DCD)
3
Rec eive Data (RXD)
5
Trans mit Data (TXD)
Data Terminal Ready
7
(DTR)
9
Ground (GND)
20
COM1
terminal
Pin
Desc ription
Data
Set
Ready
2
(DSR)
Reques t
to
Send
4
6
Clear to S end (CTS)
8
Ring Indic ator (RI)
10
NC
2
1
3
4
5
6
7
8
9
10
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