50-Pin Ide Connector - Compaq Deskpro 4000N Technical Reference Manual

The 50-pin connector is intended for a CD-ROM drive that operates as a slave on the secondary
IDE interface. This interface includes power and audio signals. The 50-pin connector is
illustrated below followed by the pinout.
P2
P1
Figure 5–1. 50-Pin IDE Connector.
Table 5–6. 40-Pin IDE Connector Pinout
Pin Signal Description
1 RESDRV- Reset
2 GND Ground
3 SHD07 Data Bit <7>
4 SHD08 Data Bit <8>
5 SHD06 Data Bit <6>
6 SHD09 Data Bit <9>
7 SHD05 Data Bit <5>
8 SHD10 Data Bit <10>
9 SHD04 Data Bit <4>
10 SHD11 Data Bit <11>
11 SHD03 Data Bit <3>
12 SHD12 Data Bit <12>
13 SHD02 Data Bit <2>
14 SHD13 Data Bit <13>
15 SHD01 Data Bit <1>
16 SHD14 Data Bit <14>
17 SHD00 Data Bit <0>
18 SHD15 Data Bit <15>
19 GND Ground
20 -- (Key Space)
21 DRQ DMA Request
22 GND Ground
23 IOW- I/O Write
24 GND Ground
25 IOR- I/O Read
NOTES:
[1] Pin is left floating to make CD-ROM always slave.
Table 5-5.
50-Pin IDE Connector Pinout
Pin Signal
26 GND
27 CHRDY
28 ALE
29 DAK-
30 GND
31 IRQ
32 IO16-
33 A1
34 PDIAG-
35 A0
36 A2
37 CS1FX-
38 CS3FX-
39 DASF-
40 GND
41 AUD L
42 AUD R
43 AUD R RTN
44 AUD L RTN
45 +5 VDC
46 +5 VDC
47 +5 VDC
48 +5 VDC
49 +5 VDC
50 +5 VDC
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition - September 1997
Technical Reference Guide
P50
P49
Description
Ground
I/O Channel Ready
Cable Select [1]
DMA Acknowledge
Ground
Interrupt Request [1]
16-bit I/O
Address 1
Pass Diagnostics
Address 0
Address 2
Chip Select
Chip Select
Drive Active
Ground
Left Channel Audio
Right Channel Audio
Right Channel Audio Return
Left Channel Audio Return
Motor Power
Motor Power
Motor Power
Motor Power
Log Power
Log Power
5-9