Parallel Connector - Dell Inspiron 4150 User Manual

Pin Assignments for I/O Connectors: Dell Inspiron 4150
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.
Pin Signal I/O Definition
1 DCD I
2 RXDA I
3 TXDA O
4 DTR O
5 GND N/A
6 DSR I
7 RTS O
8 CTS I
9 RI I
Shell N/A N/A

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 transmits data in parallel format, where 8 data bits
(one byte) are sent simultaneously over eight separate lines.
The parallel connector can also be configured for compatibility with the PS/2 standard. Support for the
EPP feature improves network adapter performance (adapters connect to the computer's parallel
connector and require the appropriate software drivers from the adapter's manufacturer).
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Data carrier detect
Receive data
Transmit data
Data terminal ready
Signal ground
Data set ready
Request to send
Clear to send
Ring indicator
Frame ground