VII. GPORT serial port pin definition
GPORT incorporates standard RS-232 9-pin DTE interfaces, which meet the
definition of the pins of 9-pin serial ports.
Specifications of signal pins commonly used in DB9M and DB25M
9-pin serial port (DB9)
25-pin serial port (DB25)
Pin
No.
Features
Abbr.
Pin
No.
Feature
Abbr.
1
Data Carrier
Detection
DCD
8
Data Carrier
Detection
DCD
2
Receive Data RXD
3
Receive Data
RXD
3
Transit Data
TXD
2
Transit Data
TXD
4
Data Terminal
Ready
DTR
20
Data Terminal
Ready
DTR
5
Ground
GND
7
Ground
GND
6
Data Set Ready
DSR
6
Data Set
Ready
DSR
7
Request to
Send
RTS
4
Request to
Send
RTS
8
Clear to Send
CTS
5
Clear to Send
CTS
9
RING
RI
22
RING
RI
RS232 DB9M-------DB9M connection (DTE
ßà
DTE)
1-6-------------------4
2---------------------3
3---------------------2
4---------------------1-6
5---------------------5
7---------------------8
8---------------------7
