Connector Pin Assignments
ATA/ATAPI (IDE) Standard Drive Cable
Pin
Signal
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
20-Pin Power
Pin
Signal
1
+3.3 V
2
+3.3 V
3
GND
4
+5 V
5
GND
*Open for d300 series computers; -5V for all others
A–4
Connector
Pin
Signal
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
Connector
20
10
Pin
Signal
6
+5 V
7
GND
8
PWROK
9
+5V SB
10
+12 V
377977-AA1
Pin
Signal
29
DMAK
30
Ground
31
INTRQ
32
IOCS16
33
DA1
34
PDIAG (cable detect)
35
DA0
36
DA2
37
CS1FX
38
CS3FX
39
DASP
40
Ground
11
1
Pin
Signal
11
+3.3 V
12
-12 V
13
GND
14
PSON/
SLP S5#
15
GND
Service Reference Guide, d260
Pin
Signal
16
GND
17
GND
18
open*
19
+5 V
20
+5 V