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ATA REGISTERS SSD-DXXX(I)-4210 DATA SHEET
SILICONSYSTEMS PROPRIETARY
This document and the information contained within it is confidential and proprietary to SiliconSystems, Inc.
All unauthorized use and/or reproduction is prohibited.
4210D-03DSR PAGE 31 FEBRUARY 2, 2009
SECTOR NUMBER REGISTER
The Sector Number register is set by the host to specify the starting sector
number associated with the next ATA command to be executed. Following a
qualified ATA command sequence, the device sets the register value to the
last sector read or written as a result of the previous AT command.
When Logical Block Addressing (LBA) mode is implemented and the host
issues a command, the contents of the register describe the Logical Block
Number bits A[7:0]. Following an ATA command, the device loads the register
with the LBA block number resulting from the last ATA command.
Table 18: Sector Number Register
Operation
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Read/Write Sector Number (CHS Addressing)
Logical Block Number bits A07-A00 (LBA Addressing)
Default Value 0 0 0 0 0 0 0 1