Chapter
1
Motherboard
Description
1-26
Connectivity
The serial ports 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
ports.
Signal
Name
DB9 PIN
DB25 PIN
DCD Data
Carrier
Detect
1
8
RX Receive
Data 2
3
TX Transmit
Data 3
2
DTR Data
Terminal
Ready
4
20
GND Signal
Ground
5
7
DSR Data
Set
Ready 6
6
RTS Request
to
Send 7
4
CTS
Clear to Send
8
5
RI Ring
Indicator 9
22
Содержание M7TTB
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