Текст страницы
12.49.4 Serial ATA Feature (10h)
When the Feature register is set to 10h or 90h, the value set to the Sector Count register specifies the specific Serial
ATA feature to enable or disable.
Sector Count Value
Description
01h
Non-zero buffer offset in DMA Setup FIS
02h
DMA Setup FIS Auto-Activate optimization
03h
Device-initiated interface power state transitions
04h
Guaranteed In-Order Data Delivery
06h
Software Settings Preservation
09h
Device Sleep
0Bh
Power Disable
12.49.5
Set Maximum Host Interface Sector Time (43h)
Sector Count
Typical PIO Mode Host Interface Sector Time (7:0)
LBA Low
Typical PIO Mode Host Interface Sector Time (15:8)
LBA Mid
Typical DMA Mode Host Interface Sector Time (7:0)
LBA High
Typical DMA Mode Host Interface Sector Time (15:8)
Subcommand code 43h allows the host to inform the device of a host interface rate limitation. The typical Host
Interface Sector Times have the same units as Identify Device Word 96 for DMA and Word 104 for PIO. A value of
zero indicates that the host interface shall be capable of transferring data at the maximum rate allowed by the selected
transfer mode. The Typical PIO Mode Host Interface Sector Time includes the host’s interrupt service time.
281
Hard Disk Drive Specification