Ide Connector - Compaq Deskpro 4000 Technical Reference Manual

Chapter 5 Input/Output Interfaces
5.2.2

IDE CONNECTOR

This system uses a standard 40-pin connector for IDE devices. Device power is supplied through
a separate connector.
Figure 5–1. 40-Pin IDE Connector.
Table 5–5. 40-Pin IDE Connector Pinout
Pin Signal
1 RESET-
2 GND
3 DD7
4 DD8
5 DD6
6 DD9
7 DD5
8 DD10
9 DD4
10 DD11
11 DD3
12 DD12
13 DD2
14 DD13
15 DD1
16 DD14
17 DD0
18 DD15
19 GND
20 --
NOTES:
[1] Primary connector wired to IRQ14, secondary connector wired to IRQ15.
[2] Pin 39 is used for spindle sync and drive activity (becomes SPSYNC/DACT-)
when synchronous drive are connected.
5-8 Compaq Deskpro 4000 and 6000 Personal Computers
featuring the Pentium II Processor
Table 5-5.
40-Pin IDE Connector Pinout
Description
Reset
Ground
Data Bit <7>
Data Bit <8>
Data Bit <6>
Data Bit <9>
Data Bit <5>
Data Bit <10>
Data Bit <4>
Data Bit <11>
Data Bit <3>
Data Bit <12>
Data Bit <2>
Data Bit <13>
Data Bit <1>
Data Bit <14>
Data Bit <0>
Data Bit <15>
Ground
Key
First Edition – October 1997
Pin Signal Description
21 DRQ DMA Request
22 GND Ground
23 IOW- I/O Write
24 GND Ground
25 IOR- I/O Read
26 GND Ground
27 IORDY I/O Channel Ready
28 CSEL Cable Select
29 DAK- DMA Acknowledge
30 GND Ground
31 IRQn Interrupt Request [1]
32 IO16- 16-bit I/O
33 DA1 Address 1
34 DSKPDIAG Pass Diagnostics
35 DA0 Address 0
36 DA2 Address 2
37 CS0- Chip Select
38 CS1- Chip Select
39 HDACTIVE- Drive Active (front panel LED) [2]
40 GND Ground