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APPENDIX A: Port Connections
A.2 DB25 Serial Port Connections
Pin
Name
Description
1
FG
Connected to pin 7 with optional jumper.
2
TXD
Serial Transmit Data; also used as a
power source.
3
RXD
Serial Receive Data; also used as a
power source.
4
RTS
Request to Send; also used as a power
source.
5
CTS
Clear to Send; also used as a power
source.
6
DSR
Data Set Ready; also used as a power
source.
7
SG
Signal Ground.
8
DCD
Carrier Detect; also used as a power
source.
9
+V in
Used as a power source.
20
DTR
Data Terminal Ready; also used as a
power source.
NOTE
All other pins are not connected.
Содержание PI080A-R2
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