User Manual

ATA Command Description
CompactFlash
®
Memory Card Product Manual, Rev. 10.0 © 2002 SANDISK CORPORATION 5-19
5.1.23. Wear Level—F5H
Table 5-29. Wear Level
Bit -> 7 6 5 4 3 2 1 0
Command (7) F5H
C/D/H (6) X X X Drive Flag
Cyl High (5) X
Cyl Low (4) X
Sec Num (3) X
Sec Cnt (2) Completion Status
Feature (1) X
This command is effectively a NOP command and only implemented for backward compatibility with earlier
SanDisk SDP series products. The Sector Count Register will always be returned with an 00H indicating Wear
Level is not needed.
5.1.24. Write Buffer—E8H
Table 5-30. Write Buffer
Bit -> 7 6 5 4 3 2 1 0
Command (7) E8H
C/D/H (6) X Drive X
Cyl High (5) X
Cyl Low (4) X
Sec Num (3) X
Sec Cnt (2) X
Feature (1) X
The Write Buffer command enables the host to overwrite contents of the CompactFlash Memory Card’s sector
buffer with any data pattern desired. This command has the same protocol as the Write Sector(s) command and
transfers 512 bytes.