Table 3-4 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
3-4 Pin assignments on the ATA 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, /HDMARDY, HSTROBE
26
GROUND
27
IORDY, /DDMARDY, DSTROBE
28
CSEL
29
/DMACK
30
GROUND
31
INTRQ
32
/IOCS16
33
DA1
34
/PDIAG, /CBLID
35
DA0
36
DA2
37
/CS0
38
/CS1
39
/DASP
40
GROUND
41
+5V LOGIC
42
+5V MOTOR
43
GROUND
44
Reserved
CSEL, /DASP, /IOCS16, and /PDIAG are not used; see Table
3-5
