Parallel ATA / EIDE


40 pin female connector (at the cable)


44 pin female connector (at the cable)

PinFunctionPinFunction
1Reset2Ground
3Data 74Data 8
5Data 66Data 9
7Data 58Data 10
9Data 410Data 11
11Data 312Data 12
13Data 214Data 13
15Data 116Data 14
17Data 018Data 15
19Ground20Key or VCC_in
21DDRQ22Ground
23I/O write24Ground
25I/O read26Ground
27IOCHRDY28Cable select
29DDACK30Ground
31IRQ32IOCS16
33Addr 134GPIO_DMA66_Detect
35Addr 036Addr 2
37Chip select 1P38Chip select 3P
39Activity40Ground
41+5 VDC (Logic)42+5 VDC (Motor)
43Ground44Type (0=ATA)

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)

PinFunction
1Ground
2A+ (transmit)
3A- (transmit)
4Ground
5B- (receive)
6B+ (receive)
7Ground
8Coding notch