IDE 是 Integrated Drive Electronics 的縮寫，由 Compaq 和 Western Digital 公司開發，新版的 IDE 命名為 ATA 即 AT bus Attachment，IDE 介面在設備和主板側的外觀為 40 腳插針：
IDE 電纜外觀為：
引腳定義
| 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 |
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