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5-16 C141-E262
5.2.3.3 Register - Device to Host
The Register - Device to Host 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
Error Status R I R Reserved (0) FIS Type (34h)
0
Device LBA High LBA Mid LBA Low
1
Reserved (0) LBA High (exp) LBA Mid (exp) LBA Low (exp) (0)
2
Reserved (0) Reserved (0) Sector Count (exp) Sector Count
3
Reserved (0) Reserved (0) Reserved (0) 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
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
Reserved (0) Reserved (0) R R R Reserved (0) FIS Type (39h)
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.