Ports and connector pin-outs, Port locations, Serial connector – Dell Inspiron 4000 User Manual
Page 13: Parallel connector
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Ports and Connector Pin-Outs
Dell™ Inspiron™ 4000
Port Locations
Serial Connector
Use the 9-pin serial connector to attach a serial device to the computer. The serial connector passes data in serial format (1 bit at a time over one line). This
connector supports a variety of devices, including a serial mouse, that require serial data transmission. If you reconfigure your hardware, you may need pin
number and signal information for the serial connector.
Parallel Connector
Use the 25-hole parallel connector to attach a parallel device to the computer. The parallel connector is used primarily for printers. The parallel connector
Pin
Signal
I/O
Definition
1
DCD
I
Data carrier detect
2
RXDA
I
Receive data
3
TXDA
O
Transmit data
4
DTR
O
Data terminal ready
5
GND
N/A
Signal ground
6
DSR
I
Data set ready
7
RTS
O
Request to send
8
CTS
I
Clear to send
9
RI
I
Ring indicator
Shell
N/A
N/A
Frame ground