IDE Internal
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
