
176 The Essential Guide to Serial ATA and SATA Express
Feature set
General feature set
– Mandatory for devices not implementing the PACKET Command feature set.
– Use prohibited for devices implementing the PACKET Command feature set.
Protocol
DMA
Inputs
The LBA Mid, LBA High, Device, and LBA Low specify the starting sector address to be written. The
Sector Count register specifies the number of sectors to be transferred.
Register 76543210
Features na
Sector Count Sector count
LBA Low LBA (7:0)
LBA Mid LBA (15:8)
LBA High LBA (23:16)
Device obs LBA obs DEV LBA (27:24)
Command CAh
Sector Count –
Number of sectors to be transferred. A value of 00h specifies ...