Fujitsu 見た MHV2080BH マニュアル

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Fujitsu 見た MHV2080BH
5.2 Logical Interface
C141-E224 5-17
5.2.3 Outline of the frame information structure (FIS)
The transport layer converts data written in a Block Register into the FIS, and
sends it to the upper layer.
The FIS, which is generated in the transport layer, is explained below.
5.2.3.1 FIS types
The types of FIS are as follows (Each FIS is referred to as abbreviation in square
brackets in this manual.):
• Register- Host to Device [RegHD]
• Register- Device to Host [RegDH]
• DMA Active – Device to Host [DMA Active]
• DMA Setup – Device to Host or Host to Device (Bidirectional)
[DMA Setup]
• Set Device Bits – Device to Host [SetDB]
• BIST Active – Bidirectional [BIST Active]
• PIO Setup – Device to Host [PIO Setup]
• Data – Host to Device or Device to Host (Bidirectional) [DATA]
5.2.3.2 Register - Host to Device
The Register - Host to Device FIS has the following layout:
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9 8 7 6 5 4 3 2 1 0
Features Command C R R Reserved (0) FIS Type (27h)
0
Device LBA High LBA Mid LBA Low
1
Features (exp) LBA High (exp) LBA Mid (exp) LBA Low (exp)
2
Control Reserved (0) Sector Count (exp) Sector Count
3
Reserved (0) Reserved (0) Reserved (0) Reserved (0)
4
Figure 5.4 Register - Host to Device FIS layout
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