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Maintenance & Service Guide
Presario 305 Model

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Connector Pin Assignments

This appendix provides connector pin assignment tables for Compaq Presario 305 Model Portable Computers. For more information on connectors, refer to the section on Rear Connectors.

NOTE:  The signals in all tables of this appendix are considered active high unless otherwise indicated by an asterisk (*).

 

 

Parallel Connector

Parallel Connector

Pin Signal Pin Signal
1 Strobe* 10 Acknowledge*
2 Data Bit 0 11 Busy
3 Data Bit 1 12 Paper Out
4 Data Bit 2 13 Select
5 Data Bit 3 14 Auto Linefeed*
6 Data Bit 4 15 Error*
7 Data Bit 5 16 Initialize Printer*
8 Data Bit 6 17 Select In*
9 Data Bit 7 18-25 Signal Ground
* = Active low
 

Serial Connector

Connector Pin Signal
Serial Connector 1
2
3
4
5
6
7
8
9
Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Ready to Send
Clear to Send
Ring Indicator

Keyboard/Mouse

Connector Pin Signal
Keyboard/Mouse Connector 1
2
3
4
5
6
Data 1
Clock 2
Ground
+5 V
Clock 1
Data 2
 

External VGA Monitor

Connector Pin Signal
External VGA Monitor Connector 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Red Analog
Green Analog
Blue Analog
Not connected
Ground
Ground Analog
Ground Analog
Ground Analog
Not connected
Ground
Monitor Detect
DDC2B Data
Horizontal Sync
Vertical Sync
DDC2B Clock
 

Modem

Connector Pin Signal
Modem Connector 1
2
3
4
5
6
Unused
Unused
Tip
Ring
Unused
Unused

 

Universal Serial Bus

Connector Pin Signal
Universal Serial Bus Connector 1
2
3
4
+5V
Data -
Data +
Ground

 

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