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Interface
5.2.3.3 Register - Device to Host
The Register - Device to Host FIS has the following layout:
3
3
2
2
2
2
2
1
0
9
8
7
6
5
Error
0
Device
1
Reserved (0)
2
Reserved (0)
3
Reserved (0)
4
Figure 5.5 Register - Device to Host FIS layout
The Register - Device to Host FIS is used when information concerning the Shadow
Register Block in the host adapter is updated. This FIS indicates that the device has
completed a command operation. Furthermore, this is a mechanism for changing
information concerning the Shadow Register Block of the host adapter.
I - If this bit is set, an interrupt request is issued to the host system.
5.2.3.4 DMA Active - Device to Host
The DMA Active - Device to Host FIS has the following layout:
3
3
2
2
2
2
2
1
0
9
8
7
6
5
Reserved (0)
0
Figure 5.6 DMA Active - Device to Host FIS layout
The host uses the DMA Active - Device to Host FIS layout. This FIS instructs the
host to continue transferring DMA data from the host to the device.
5-16
2
2
2
2
2
1
1
1
1
4
3
2
1
0
9
8
7
6
Status
LBA High
LBA High (exp)
Reserved (0)
Reserved (0)
2
2
2
2
2
1
1
1
1
4
3
2
1
0
9
8
7
6
Reserved (0)
1
1
1
1
1
1
9 8 7 6 5 4 3 2 1 0
5
4
3
2
1
0
R I R Reserved (0)
LBA Mid
LBA Mid (exp)
Sector Count (exp)
Reserved (0)
1
1
1
1
1
1
9 8 7 6 5 4 3 2 1 0
5
4
3
2
1
0
R R R Reserved (0)
FIS Type (34h)
LBA Low
LBA Low (exp) (0)
Sector Count
Reserved (0)
FIS Type (39h)
C141-E261
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Troubleshooting
