ATA IDE pinout

ATA IDE connector
(cable side)

Pin Signal Description
1 /RESET Reset
2 GND Ground
3 DD7 Data 7
4 DD8 Data 8
5 DD6 Data 6
6 DD9 Data 9
7 DD5 Data 5
8 DD10 Data 10
9 DD4 Data 4
10 DD11 Data 11
11 DD3 Data 3
12 DD12 Data 12
13 DD2 Data 2
14 DD13 Data 13
15 DD1 Data 1
16 DD14 Data 14
17 DD0 Data 0
18 DD15 Data 15
19 GND Ground
20 KEY Key
21 n/c Not connected
22 GND Ground
23 /IOW Write Strobe
24 GND Ground
25 /IOR Read Strobe
26 GND Ground
27 IO_CH_RDY  
28 ALE Address Latch Enable
29 n/c Not connected
30 GND Ground
31 IRQR Interrupt Request
32 /IOCS16 IO ChipSelect 16
33 DA1 Address 1
34 n/c Not connected
35 DA0 Address 0
36 DA2 Address 2
37 /IDE_CS0 (1F0-1F7)
38 /IDE_CS1 (3F6-3F7)
39 /ACTIVE Led driver
40 GND Ground

About ATA IDE

The parallel bus transfers data from hard disks and optical stores (CD and DVD) and back. It is known as Parallel ATA and today gives a up the place Serial ATA. Last version uses a 40-contact wire with 80 veins (half on "ground"). Each such cable allows to connect, a maximum, two devices when one works in a mode "master", and the second - in "slave". Usually the mode is switched by means of the small lintel on the device.

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