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Pin Assignments for I/O Connectors
Dell™ Latitude™ C840 Service Manual
USB Connector
Pin
Signal
1
VCC
2
-Data
3
+Data
4
Ground
Serial Connector
Pin
Signal
Pin
1
DCD
6
2
RXDA
7
3
TXDA
8
4
DTR
9
5
GND
Parallel Connector
Pin
Signal
Pin
1
STRB#
11
Signal
DSR
RTS
CTS
RI
Signal
BUSY