ST9144 Family Installation Guide, Rev. B | 11 | |
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44-Pin AT interface connector assignments
Pin | Signal | I/O | Pin | Signal | I/O |
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01 | /Host Reset | O | 02 | Ground |
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03 | Host Data 7 | I/O | 04 | Host Data 8 | I/O |
05 | Host Data 6 | I/O | 06 | Host Data 9 | I/O |
07 | Host Data 5 | I/O | 08 | Host Data 10 | I/O |
09 | Host Data 4 | I/O | 10 | Host Data 11 | I/O |
11 | Host Data 3 | I/O | 12 | Host Data 12 | I/O |
13 | Host Data 2 | I/O | 14 | Host Data 13 | I/O |
15 | Host Data 1 | I/O | 16 | Host Data 14 | I/O |
17 | Host Data 0 | I/O | 18 | Host Data 15 | I/O |
19 | Ground |
| 20 | Key | No Pin |
21 | Reserved |
| 22 | Ground |
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23 | /HIOW | O | 24 | Ground |
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25 | /HIOR | O | 26 | Ground |
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27 | Reserved |
| 28 | Reserved |
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29 | Reserved |
| 30 | Ground |
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31 | IRQ 14 | I | 32 | /Host IO16 (AT) | I |
33 | Host ADDR 1 | O | 34 | /PDIAG (16) | Notes |
35 | Host ADDR 0 | O | 36 | Host ADDR 2 | O |
37 | /Host CS0 | O | 38 | /Host CS1 | O |
39 | /DASP | Notes | 40 | Ground |
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41 | +5 VDC (Logic) |
| 42 | +5 VDC (Motor) |
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43 | Ground |
| 44 | Reserved |
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/indicates active low signal. Direction is with respect to the host. I indicates to the host, O indicates from the host. Reserved pins/ground do not have direction. /PDIAG and /DASP are used for communication between master and slave drives.