5.2 Logical Interface
5.2.3.7 Data - Host to Device or Device to Host (Bidirectional)
This Data FIS has the following layout:
| 3 | 3 |
| 2 | 2 | 2 | 2 |
| 2 | 2 | 2 | 2 |
| 2 | 2 | 1 |
| 1 |
| 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | 0 |
| 9 | 8 | 7 | 6 |
| 5 | 4 | 3 | 2 |
| 1 | 0 | 9 |
| 8 |
| 7 | 6 | 5 | 4 | 3 |
| 2 | 1 | 0 |
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0 |
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| Reserved (0) |
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| Reserved (0) |
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| R | R | R |
| Reserved (0) |
| FIS Type (46h) |
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... |
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| N Dwords of data |
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... |
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| (1 to 2048 Dwords) |
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Figure 5.9 Data FIS (Bidirectional) layout
The Data FIS is used for data transfers between the host system and device.
5.2.3.8 PIO Setup - Device to Host
0 |
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| Error |
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| Status |
| R | I | D | Reserved (0) |
| FIS Type (5Fh) | |||||||||||||||||
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1 |
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| Dev / Head |
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| Cyl High |
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| Cyl Low |
| Sector Number | ||||||||||||||||||||
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2 |
| Reserved (0) |
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| Cyl High (exp) |
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| Cyl Low (exp) |
| Sector Num (exp) (0) | |||||||||||||||||||||||
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3 |
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| E_Status |
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| Reserved (0) |
| Sector Count (exp) |
| Sector Count | |||||||||||||||||||||||
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4 |
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| Reserved (0) |
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| Transfer Count | ||||||||||||||||||||
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| Figure 5.10 PIO Setup - Device to Host FIS layout | |||||||||||||||||||||||||||
The PIO Setup FIS is a device to host FIS, FIS Type 5Fh. The PIO Setup FIS is used by the device to provide the host adapter with the data transfer count and DRQ block status during the PIO data phase. This information allows the host adapter to control PIO data transfers. There are two command structure Response mappings into a Response FIS in the serial transport.
a)
b)