Table of Contents
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Chapter 1
Connectivity
The serial port can be used in many ways, and it may be necessary to become
familiar with the pinout diagram. The following chart gives you the function of
each pin on the 9-pin connector and some of the 25-pin connector. This information
can be used when configuring certain software programs to work with the serial
port.
Signal
DCD
Data Carrier Detect
RX
Receive Data
TX
Transmit Data
DTR
Data Terminal Ready
GND
Signal Ground
DSR
Data Set Ready
RTS
Request to Send
CTS
Clear to Send
RI
Ring Indicator
Name
DB9 PIN
1
2
3
4
5
6
7
8
9
1-17
Motherboard Description
DB25 PIN
8
3
2
20
7
6
4
5
22
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