ATA接口是AT bus Attachment 的縮寫，那么到底什么是ata接口呢，其實我們平時用的并口硬盤都是ata接口的,他是由由Conner, Seagate 和 Western Digital 公司開發，現在的硬盤接口大多為ata接口的擴展版本,ATA 接口在設備和主板側的外觀為40腳插針（現在為80線了）：
ata接口圖 
|
ata接口引腳定義表 |
|
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 (Pin missing) |
|
21 |
DMARQ |
? |
DMA Request |
|
22 |
GND |
|
Ground |
|
23 |
/DIOW |
|
Write Strobe |
|
24 |
GND |
|
Ground |
|
25 |
/DIOR |
|
Read Strobe |
|
26 |
GND |
|
Ground |
|
27 |
IORDY |
|
I/O Ready |
|
28 |
SPSYNC:CSEL |
? |
Spindle Sync or Cable Select |
|
29 |
/DMACK |
? |
DMA Acknowledge |
|
30 |
GND |
|
Ground |
|
31 |
INTRQ |
|
Interrupt Request |
|
32 |
/IOCS16 |
? |
IO ChipSelect 16 |
|
33 |
DA1 |
|
Address 1 |
|
34 |
PDIAG |
? |
Passed Diagnostics |
|
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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