Ide Connector - HP Deskpro EX Technical Reference Manual

5.2.2 IDE CONNECTOR

This system uses a standard 40-pin connector for the primary IDE device and connects (via a
cable) to the hard drive installed in the right side drive bay. Note that some signals are re-defined
for UATA/33 and UATA/66 modes, which require a special 80-conductor cable (supplied)
designed to reduce cross-talk. Device power is supplied through a separate connector.
Figure 5-1. 40-Pin Primary IDE Connector (on system board).
Table 5–3. 40-Pin Primary 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] On UATA/33 and higher modes, re-defined as STOP.
[2] On UATA/33 and higher mode reads, re-defined as DMARDY-.
On UATA/33 and higher mode writes, re-defined as STROBE.
[3] On UATA/33 and higher mode reads, re-defined as STROBE-.
On UATA/33 and higher mode writes, re-defined as DMARDY-.
[4] Primary connector wired to IRQ14, secondary connector wired to IRQ15.
[5] Pin 39 is used for spindle sync and drive activity (becomes SPSYNC/DACT-)
when synchronous drives are connected.
Table 5-3.
40-Pin Primary IDE Connector Pinout
Description Pin
Reset 21
Ground 22
Data Bit <7> 23
Data Bit <8> 24
Data Bit <6> 25
Data Bit <9> 26
Data Bit <5> 27
Data Bit <10> 28
Data Bit <4> 29
Data Bit <11> 30
Data Bit <3> 31
Data Bit <12> 32
Data Bit <2> 33
Data Bit <13> 34
Data Bit <1> 35
Data Bit <14> 36
Data Bit <0> 37
Data Bit <15> 38
Ground 39
Key 40
Compaq Deskpro EX Series of Personal Computers
First Edition - August 2000
Technical Reference Guide
Signal Description
DRQ DMA Request
GND Ground
IOW- I/O Write [1]
GND Ground
IOR- I/O Read [2]
GND Ground
IORDY I/O Channel Ready [3]
CSEL Cable Select
DAK- DMA Acknowledge
GND Ground
IRQn Interrupt Request [4]
IO16- 16-bit I/O
DA1 Address 1
DSKPDIAG Pass Diagnostics
DA0 Address 0
DA2 Address 2
CS0- Chip Select
CS1- Chip Select
HDACTIVE- Drive Active (front panel LED) [5]
GND Ground
5-3