CHAPTER 3
I/O Features
18 Internal IDE Hard Disk Drive
Figure 3-2 Connector for the internal IDE hard disk
Signal Assignments 3
Table 3-1 shows the signal assignments on the 44-pin portion of the hard disk connector.
A slash (/) at the beginning of a signal name indicates an active-low signal.
Table 3-1 Signal assignments on the IDE hard disk connector
Pin
number Signal name
Pin
number Signal name
1 /RESET 2 GROUND
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 GROUND 20 KEY
21 DMARQ 22 GROUND
23 /DIOW 24 GROUND
25 /DIOR 26 GROUND
27 IORDY 28 CSEL
29 /DMACK 30 GROUND
continued
Note: Dimensions are in millimeters [inches]
19.25 maximum
[0.757 maximum]
3.99
[0.157]
10.14±0.375
[0.399±0.014]
Key: vacant
position at pin 20
Vacant row in
50-pin connector
Pin 1
Center line of pin 44
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