Connector Pin Assignments - Compaq Presario 1800 - Notebook PC Maintenance And Service Manual

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Illustrated Parts Catalog

Connector Pin Assignments

This appendix provides connector pin assignment tables for Compaq Presario 1800
Series 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 (*).
Pin Signal
1 Strobe*
2 Data Bit 0
3 Data Bit 1
4 Data Bit 2
5 Data Bit 3
6 Data Bit 4
7 Data Bit 5
8 Data Bit 6
9 Data Bit 7
* = Active low
Connector
Connector
Connector
Connector
Pin Signal
1 N.C.
2 N.C.
3 Kb Clk 1
4 Joystick Data A 24
5 Kb Data 1
6 Joystick Data B 26
7 Kb Clk 2
8 Joystick Data C 28
9 Kb Data 2
10 Joystick Data D 30
11 Lp Select In
12 Lp Paper End
13 Lp Initialize
14 Lp Busy
15 Lp Error
16 Lp Ack
17 Lp Auto Feed
18 Lp Strobe
19 DDC2BC
20 DDC2BD
Connector
Maintenance & Service Guide
Presario 1800 Series
Models: 1805 and 1810
| Notice | Preface |
| Removal & Replacement Procedures
Pin Assignments |
Parallel Connector
Serial Connector
Pin
1
2
3
4
5
6
7
8
9
Keyboard/Mouse
Pin
1
2
3
4
5
6
External VGA Monitor
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Universal Serial Bus
Pin
1
Ground
2 D+
3 D-
4 Power
Port Replicator
Pin Signal
21 Printer Data 0
22 Printer Data 1
23 Printer Data 2
Printer Data 3
25 Printer Data 4
Printer Data 5
27 Printer Data 6
Printer Data 7
29 USB 0 -
USB 0 +
31 USB 1 -
32 USB 1+
33 Adapter In
34 Adapter In
35 Adapter In
36 Adapter In
37 Adapter In
38 Adapter In
39 N.C.
40 N.C.
Modem
Pin
1
2
3
4
5
6
Product Description
Battery Pack Operations
Pin Signal
10 Acknowledge*
11 Busy
12 Paper Out
13 Select
14 Auto Linefeed*
15 Error*
16 Initialize Printer*
17 Select In*
18-25 Signal Ground
Signal
Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Ready to Send
Clear to Send
Ring Indicator
Signal
Data
Not defined
Ground
+5 VDC
Clock
Not defined
Signal
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
Signal
Pin Signal
41 N.C.
42 N.C.
43 Switch A
44 Switch B
45 Switch C
46 Switch D
47 N.C.
48 MIDI In
49 MIDI Out
50 +5V
51 +5V
52 N.C.
53 N.C.
54 N.C.
55 N.C.
56 Dock ID -
57 RXD
58 Lp Select
59 RI
60 DTR
Signal
Unused
Unused
Tip
Ring
Unused
Unused
| Troubleshooting
| Specifications
Pin Signal
61 CTS
62 DCD
63 DSR
64 TXD
65 RTS
66 N.C.
67 Detect
68 N.C.
69 V. Sync
70 Ground
71 H. Sync
72 Ground
73 Blue
74 Ground
75 Green
76 Ground
77 Red
78 Ground
79 N.C.
80 N.C.