Interface
The host system uses the Register - Host to Device FIS when information in the
Register Block is transferred from the host system to the device. This is the
mechanism for issuing the ATA command from the host system to the device.
C - To update the Command field, "1" would be set in this field; and to update the
Device Control field, "0" would be set in the field.
If both C = 1 and SRST = 1 are set, operation is not guaranteed.
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.
5-18
C141-E245
Summary of Contents for MHW2040BH - Mobile 40 GB Hard Drive
Page 4: ...This page is intentionally left blank ...
Page 8: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 12: ...This page is intentionally left blank ...
Page 42: ...This page is intentionally left blank ...
Page 54: ...This page is intentionally left blank ...
Page 74: ...This page is intentionally left blank ...
Page 256: ...This page is intentionally left blank ...
Page 278: ...This page is intentionally left blank ...
Page 282: ...This page is intentionally left blank ...
Page 284: ...This page is intentionally left blank ...
Page 292: ...This page is intentionally left blank ...
Page 294: ......
Page 295: ......
Page 296: ......