Secondary Ide Interface - Compaq iPAQ 1.0 Technical Reference Manual

Chapter 5 Input/Output Interfaces

5.2.3 SECONDARY IDE INTERFACE

The secondary IDE interface supports the Multibay device, which may be an optical storage device
(CD-ROM, DVD, LS-120) or a second hard drive mounted in a Multibay adapter that in turn is
installed in the Multibay. Both iPAQ 1.x and 2.0 systems provide a 68-pin female connector
(mounted on a Multibay board) that mates with the corresponding male connector of the Multibay
device or adapter.
Figure 5-2. 68-Pin Multibay Connector (on Multibay board).
Table 5–4. 68-Pin Multibay Connector Pinout
Pin Signal
1 RST-
3 DD7
5 DD6
7 DD5
9 DD4
11 DD3
13 DD2
15 DD1
17 DD0
19 GND
21 DREQ
23 IOW
25 IOR
27 IORDY
29 DACK
31 IRQ
33 DA1
35 DA0
37 CS1
39 DASP-
41 Vcc
43 GND
45 GND
47 AUD R
49 Vcc
51 DSKCHG
53 DEN ID
55 LOWDEN-
57 STEP-
59 WDATA-
61 WGATE-
63 GND
65 GND
67 GND
Diskette drive interface not connected.
5-4 Compaq iPAQ Series of Desktop Personal Computers
1
Table 5-4.
68-Pin Multibay Connector Pinout
Description
Reset
Drive Data Bit <7>
Drive Data Bit <6>
Drive Data Bit <5>
Drive Data Bit <4>
Drive Data Bit <3>
Drive Data Bit <2>
Drive Data Bit <1>
Drive Data Bit <0>
Ground
DMA request
Drive I/O Write
Drive I/O Read
I/O Channel Ready
DMA Acknowledge
Interrupt request
Drive address bit <1>
Drive address bit <0>
Chip select 1
Drive activity/drive 1 prsnt.
+5 VDC logic power
Ground
Left audio ground
Right audio
+5 VDC
Disk change
Media identification
Density select
Step
Write data
Write gate
Ground
Ground
Ground
Second Edition – February 2001
Pin Signal Description
2 GND Ground
4 DD8 Drive Data Bit <8>
6 DD9 Drive Data Bit <9>
8 DD10 Drive Data Bit <10>
10 DD11 Drive Data Bit <11>
12 DD12 Drive Data Bit <12>
14 DD13 Drive Data Bit <13>
16 DD14 Drive Data Bit <14>
18 DD15 Drive Data Bit <15>
20 (key) No connection
22 GND Ground
24 GND Ground
26 GND Ground
28 CSEL Cable select
30 GND Ground
32 GND Ground
34 PDIAG Passed diagnostics
36 DA2 Drive address bit <2>
38 CS3 Chip select 3
40 GND Ground
42 MTR PWR +5 VDC motor power
44 AUD L Left audio
46 GND Right audio ground
48 INDEX- Index
50 DRVSEL Drive select
52 GND Ground
54 MTR ON- Motor On
56 DIR- Direction in
58 DEV PRST System device present
60 GND Ground
62 TRK0- Track 00
64 WPROT- Write protect
66 RDATA- Read data
68 HDSEL- Head (side one) select