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40-pin, shrouded berg strip.
Recommended connector & cable:
Connector 3M 3417-7000 or equivalent
Strain relief 3M 3448-2040 or equivalent
Flat cable 3M 3365-40 or 3M 3517-40 or equivalent
(max.length 0.46 m (18 Inch))
IDE 40-Pin (44-Pin IDE SFF) Connector.
ANSI ATA-2 (AT Attachment) Rev. 2j. dated 2 Dec.-1994
| Pin | I/O | Signal Name | Pin | I/O | Signal Name |
|---|---|---|---|---|---|
| 1 | I | -RESET | 2 | N/A | Ground |
| 3 | I/O | D7 | 4 | O | D8 |
| 5 | I/O | D6 | 6 | O | D9 |
| 7 | I/O | D5 | 8 | O | D10 |
| 9 | I/O | D4 | 10 | O | D11 |
| 11 | I/O | D3 | 12 | O | D12 |
| 13 | I/O | D2 | 14 | O | D13 |
| 15 | I/O | D1 | 16 | O | D14 |
| 17 | I/O | D0 | 18 | O | D15 |
| 19 | NA | Ground | 20 | NA | (key) |
| 21 | NA | Reserved | 22 | NA | Ground |
| 23 | I | -IOW | 24 | NA | Ground |
| 25 | I | -IOR | 26 | NA | Ground |
| 27 | O | IORDY | 28 | NA | Reserved (VCC pullup) |
| 29 | NA | Reserved | 30 | NA | Ground |
| 31 | O | IRQ | 32 | O | -IOCS16 (VCC pullup) |
| 33 | I | A1 | 34 | I/O | -PDIAG |
| 35 | I | A0 | 36 | I | Dev.-addr. A2 |
| 37 | I | -HFCS0 | 38 | I | -HFCS1 |
| 39 | NA | -DASP | 40 | NA | Ground |
| --- | --- | 44-Pin IDE SFF | --- | --- | 44-Pin IDE SFF |
| 41 | PWR | +5V(logic) | 42 | PWR | +5V(motor) |
| 43 | PWR | GND | 44 | I | -Type(0=ATA) |
The PC provides a dedicated I/O channel for connecting a hard disk drive. The signals that are provided
by this connector include the 16-bit data bus, address lines A0 to A2, IRQ14, and -IOCS16. These signals
operate in the same way as the normal I/O-channel signals.
The address decode logic for the hard disk drive is on the system board. On a valid decode
of A0 through A15 equal to hex 01F0 through 01F7, -CS0 (hex 0170 through 0177, -CS2 for a secondary
hard disk drive) goes active. On a valid decode of A0 through A15 equal to hex 03F6 through 03F7, -CS1
(hex 0376 through 0377, -CS3 for a secondary hard disk drive) goes active.
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.