Chapter 3
Utility 2 Interface
This section describes the Utility 2, J4 interface, which supports the features in the following bullets.
Table 3-5
provides a complete list of the Utility 2 connector pin signals.
•
Floppy Drive Interface
•
IDE Interface
Floppy Drive Interface
The Super I/O chip (SCH3112I-NU) provides the floppy controller and supports one floppy drive.
IDE Interface
The ICH8-M I/O Hub (82801HBM) provides the IDE controller and supports two IDE drives.
Utility 2 Pin Signals
Table 3-5
lists the signals and their descriptions for the Utility 2 interface which provides a right-angle,
80-pin connector with 0.025" (0.635mm) pin pitch.
Table 3-5. Utility 2 Interface Pin Signals (J4)
Pin #
Signal
1
GND8
2
HD_RST*
3
FDD_DEN
4
GND3
5
GND9
6
IDE_PDD7
7
NC
8
IDE_PDD8
9
GND10
10
IDE_PDD6
11
FPY_KEY
12
IDE_PDD9
13
GND11
14
IDE_PDD5
15
FDD_INDX*
16
IDE_PDD10
17
GND12
18
IDE_PDD4
19
FDD_MTR0
20
IDE_PDD11
21
GND13
22
IDE_PDD3
23
NC
24
IDE_PDD12
25
GND14
CoreModule 740
Description
Floppy Ground
Reset – Low active hardware reset
Floppy Density Select
IDE Ground
Floppy Ground
Primary Disk Data 7
Not Connected
Primary Disk Data 8
Floppy Ground
Primary Disk Data 6
Not Connected
Primary Disk Data 9
Floppy Ground
Primary Disk Data 5
Floppy Index – Detects the drive head is positioned over the track 0
Primary Disk Data 10
Floppy Ground
Primary Disk Data 4
Floppy Motor Control 0 – Selects drive motor 0
Primary Disk Data 11
Floppy Ground
Primary Disk Data 3
Not Connected
Primary Disk Data 12
Floppy Ground
Reference Manual
Hardware
23
Need help?
Do you have a question about the CoreModule 740 and is the answer not in the manual?