Cd-Rom 50-Pin Connector; 24-Pin Power - HP dc7900 - Convertible Minitower PC Service & Reference Manual

CD-ROM 50-Pin Connector

Connector
Pin Signal
1 Audio L-ch
2 Audio R-ch
3 Audio GND
4 GND
5 RESET
6 DD8
7 DD7
8 DD9
9 DD6
10 DD10
11 DD5
12 DD11
13 DD4

24-Pin Power

Connector
24
12
Pin Signal
1 +3.3V
2 +3.3V
3 GND
4 +5V
5 GND
6 +5V
218 Appendix A Connector Pin Assignments
Pin Signal
14 DD12
15 DD3
16 DD13
17 DD2
18 DD14
19 DD1
20 DD15
21 DD0
22 DMARQ
23 GND
24 DIOR
25 DIOW
26 GND
13
Front
1
Pin Signal
7 GND
8 POK
9 +5 Vaux
10 +12V
11 +12V
12 +3.3V
Pin Signal
27 IORDY
28 DMACK
29 INTRQ
30 IOCS16
31 DA1
32 PDIAG
33 DA0
34 DA2
35 CS1FX
36 CS3FX
37 DASP
38 +5V
39 +5V
Pin Signal
13 +3.3V
14 –12V
15 GND
16 PSON
17 GND
18 GND
Pin Signal
40 +5V
41 +5V
42 +5V
43 GND
44 GND
45 GND
46 GND
47 CSEL
48 GND
49 Vendor-specific
50 Vendor-specific
Pin Signal
19 GND
20 open
21 +5V
22 +5V
23 +5V
24 GND