IDE = Integrated Drive Electronics.
Developed by Compaq and Western Digital.
Newer version of IDE goes under the name ATA=AT bus Attachment.

(40 PIN IDC Male ที่คอนโทรลเลอร์หรืออุปกรณ์.)
(40 PIN IDC Female ที่สายเคเบิล.)

Pin	Name	Dir	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

โน้ต : ทิศทางจากคอนโทรลเลอร์ไปยังอุปกรณ์