Chapter 3 | Hardware |
IDE Interface (J12, J17)
The LittleBoard 550 provides two IDE connectors for primary and secondary IDE signals. The EIDE interface logic supports the following features:
•Transfer rate up to 100Mbps
•Increase reliability using Ultra DMA 33/66/100 transfer protocols
•Full
•Supports ATAPI and DVD compliant devices
•PIO IDE transfers as fast as 14Mbps.
•Bus master IDE transfers as fast as 100Mbps.
•Single Bus Master EIDE
•Supports two IDE drives per interface channel (primary or secondary connector) Table
Table
Pin # | Signal | Description |
1 | IDERST* | IDE Reset – Low active hardware reset (RSTDRV inverted) |
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2 | GND | Ground |
3 | PDD7 | Primary Disk Data 7 – These signals |
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| Status between the host and the controller. D0 is the LSB of the even Byte of the |
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| Word. D8 is the LSB of the Odd Byte of the Word. All Task File operations |
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| occur in byte mode on the low order bus |
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| bit using |
4 | PDD8 | Primary Disk Data 8 – Refer to PDD7 on |
5 | PDD6 | Primary Disk Data 6 – Refer to PDD7on |
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6 | PDD9 | Primary Disk Data 9 – Refer to PDD7on |
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7 | PDD5 | Primary Disk Data 5 – Refer to PDD7on |
8 | PDD10 | Primary Disk Data 10 – Refer to PDD7 on |
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9 | PDD4 | Primary Disk Data 4 – Refer to PDD7 on |
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10 | PDD11 | Primary Disk Data 11 – Refer to PDD7 on |
11 | PDD3 | Primary Disk Data 3 – Refer to PDD7 on |
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12 | PDD12 | Primary Disk Data 12 – Refer to PDD7 on |
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13 | PDD2 | Primary Disk Data 2 – Refer to PDD7 on |
14 | PDD13 | Primary Disk Data 13 – Refer to PDD7 on |
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15 | PDD1 | Primary Disk Data 1 – Refer to PDD7 on |
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16 | PDD14 | Primary Disk Data 14 – Refer to PDD7 on |
17 | PDD0 | Primary Disk Data 0 – Refer to PDD7 on |
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18 | PDD15 | Primary Disk Data 15 – Refer to PDD7 on |
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19 | GND | Ground |
20 | NC/Key | Not connected / Key pin plug |
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LittleBoard 550 | Reference Manual | 35 |