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Chapter 5 Input/Output Interfaces
5-4 Compaq iPAQ Family of Internet Devices
First Edition – March 2000
The system board includes a 50-pin connector for the secondary IDE drive that is installed in the
MultiBay mounting position on the left side of the chassis. This interface includes power and
audio signals. The 50-pin system/daughter board connector is illustrated below followed by the
pinout.
Figure 5-2.
50-Pin Secondary IDE Connector (on system and daughter boards).
Table 5–4
. 50-Pin Secondary IDE Connector Pinout
Table 5-4.
50-Pin Secondary IDE Connector Pinout
Pin Signal Description Pin Signal Description
1 AUD L Left channel audio 2 AUD R Right channel audio
3 AUD RTN Audio return 4 AUD RTN Audio return
5 NC Not connected 6 MBAY Multibay device sense
7 RST Reset 8 GND Ground
9 D7 Data Bit <7> 10 D8 Data Bit <8>
11 D6 Data Bit <6> 12 D9 Data Bit <9>
13 D5 Data Bit <5> 14 D10 Data Bit <10>
15 D4 Data Bit <4> 16 D11 Data Bit <11>
17 D3 Data Bit <3> 18 D12 Data Bit <12>
19 D2 Data Bit <2> 20 D13 Data Bit <13>
21 D1 Data Bit <1> 22 D14 Data Bit <14>
23 D0 Data Bit <0> 24 D15 Data Bit <15>
25 GND Ground 26 -- (Key Space)
27 DDRQ1 Data request 28 GND Ground
29 I/O W- I/O write 30 GND Ground
31 I/O R- I/O read 32 GND Ground
33 I/OCHRDY I/O channel ready 34 P_ALE Cable select
35 ACK1- Acknowledge 36 GND Ground
37 IRQ15 Interrupt request 15 38 IO16 16-bit I/O transfer
39 AD1 Address bit <1> 40 PDIAG Diagnostic
41 AD0 Address bit <0> 42 AD2 Address bit <2>
43 CS1 Chip select <1> 44 CS3 Chip select <3>
45 ACT- Activity 46 GND Ground
47 Vcc +5 VDC 48 Vcc +5 VDC logic power
49 GND Ground 50 NC Not connected
5.3 DISKETTE DRIVE INTERFACE
NOTE:
The Compaq iPAQ
does not
support a diskette drive. However, the LPC47B277
I/O controller contains a diskette drive controller that may need to be enabled (with
Setup) to satisfy the requirements of some operating systems. This will result in device
manager applications indicating the presence of a diskette drive that in fact is
not
available.
P1
P49
P50
P2