SanDisk SDCFH-004G Product Manual - Page 58

Erase Sectors-C0H, Format Track-50H

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ATA Command Description SanDisk CompactFlash Card OEM Product Manual 5.1.3 Erase Sector(s)-C0H This command is no longer recommended. There is essentially no net gain in the use of the Erase Sectors Command and/or the Write Without Erase Commands. This command is supported to guarantee backward compatibility. Table 5-5 Erase Sectors Bit 7 6 5 4 3 2 1 0 Command (7) C0H C/D/H (6) 1 LBA 1 Drive Head (LBA 27-24) Cyl High (5) Cylinder High (LBA 23-16) Cyl Low (4) Sec Num (3) Cylinder Low (LBA 15-8) Sector Number (LBA 7-0) Sec Cnt (2) Sector Number (LBA 7-0) Feature (1) X 5.1.4 Format Track-50H This command writes the desired head and cylinder of the selected drive with an FFh pattern. To remain host backward compatible, the card expects a sector buffer of data from the host to follow the command with the same protocol as the Write Sector(s) command although the information in the buffer is not used by the card. If LBA=1 then the number of sectors to format is taken from the Sec Cnt register (0=256). NOTE: The Format Track command in Table 5-6 is no longer recommended. The command is supported to guarantee backward compatibility. Table 5-6 Format Track Bit Command (7) C/D/H (6) Cyl High (5) Cyl Low (4) Sec Num (3) Sec Cnt (2) Feature (1) 7 6 5 4 3 2 1 0 50H 1 LBA 1 Drive Head (LBA 27-24) Cylinder High (LBA 23-16) Cylinder Low (LBA 15-8) X (LBA 7-0) Count (LBA mode only) X 02/07, Rev. 12.0 5-4 © 2007 SanDisk Corporation

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ATA Command Description
SanDisk CompactFlash Card OEM Product Manual
5.1.3
Erase Sector(s)–C0H
This command is no longer recommended. There is essentially no net gain in the use of the
Erase Sectors Command and/or the Write Without Erase Commands. This command is
supported to guarantee backward compatibility.
Table 5-5
Erase Sectors
Bit
7
6
5
4
3
2
1
0
Command (7)
C0H
C/D/H (6)
1
LBA
1
Drive
Head (LBA 27-24)
Cyl High (5)
Cylinder High (LBA 23-16)
Cyl Low (4)
Cylinder Low (LBA 15-8)
Sec Num (3)
Sector Number (LBA 7-0)
Sec Cnt (2)
Sector Number (LBA 7-0)
Feature (1)
X
5.1.4
Format Track–50H
This command writes the desired head and cylinder of the selected drive with an FFh pattern.
To remain host backward compatible, the card expects a sector buffer of data from the host to
follow the command with the same protocol as the Write Sector(s) command although the
information in the buffer is not used by the card. If LBA=1 then the number of sectors to
format is taken from the Sec Cnt register (0=256).
NOTE
:
The Format Track command in Table 5-6 is no longer recommended.
The command is supported to guarantee backward compatibility.
Table 5-6
Format Track
Bit
7
6
5
4
3
2
1
0
Command (7)
50H
C/D/H (6)
1
LBA
1
Drive
Head (LBA 27-24)
Cyl High (5)
Cylinder High (LBA 23-16)
Cyl Low (4)
Cylinder Low (LBA 15-8)
Sec Num (3)
X (LBA 7-0)
Sec Cnt (2)
Count (LBA mode only)
Feature (1)
X
02/07, Rev. 12.0
5-4
© 2007 SanDisk Corporation