Fujitsu MHV2040BH 用户手册
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.
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.):
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]
[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
1
3
0
0
2
9
9
2
8
8
2
7
7
2
6
6
2
5
5
2
4
4
2
3
3
2
2
2
2
1
1
2
0
0
1
9
9
1
8
8
1
7
7
1
6
6
1
5
5
1
4
4
1
3
3
1
2
2
1
1
1
1
0
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