Parallel ATA / EIDE
40 pin female connector (at the cable)
44 pin female connector (at the cable)
Pin | Function | Pin | Function |
1 | Reset | 2 | Ground |
3 | Data 7 | 4 | Data 8 |
5 | Data 6 | 6 | Data 9 |
7 | Data 5 | 8 | Data 10 |
9 | Data 4 | 10 | Data 11 |
11 | Data 3 | 12 | Data 12 |
13 | Data 2 | 14 | Data 13 |
15 | Data 1 | 16 | Data 14 |
17 | Data 0 | 18 | Data 15 |
19 | Ground | 20 | Key or VCC_in |
21 | DDRQ | 22 | Ground |
23 | I/O write | 24 | Ground |
25 | I/O read | 26 | Ground |
27 | IOCHRDY | 28 | Cable select |
29 | DDACK | 30 | Ground |
31 | IRQ | 32 | IOCS16 |
33 | Addr 1 | 34 | GPIO_DMA66_Detect |
35 | Addr 0 | 36 | Addr 2 |
37 | Chip select 1P | 38 | Chip select 3P |
39 | Activity | 40 | Ground |
41 | +5 VDC (Logic) | 42 | +5 VDC (Motor) |
43 | Ground | 44 | Type (0=ATA) |
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ATAPI-44 connector (used on 2.5" devices) has 4 additional pins used for power.
Pins 1-40 are the same as the 40 pin connector, but the spacing between pins is smaller and they are not physically compatible.
80-wire cables has the same pinout as 40-conductor cables. Internally the connectors are different: the 80-wire cable provides one ground wire to each signal wire.
Cables usually come with three differently colored connectors (blue=controller, black=master drive, gray=slave drive)
Serial ATA
7 pin SATA plug
7 pin eSATA connector (male and female)
Pin | Function |
1 | Ground |
2 | A+ (transmit) |
3 | A- (transmit) |
4 | Ground |
5 | B- (receive) |
6 | B+ (receive) |
7 | Ground |
8 | Coding notch |