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An unrecoverable error encountered while writing data results in aborting the command and the Command Block
registers contain the 48 – bit sector address of the sector where the first unrecoverable error occurred. Subsequent
FLUSH CACHE EXT commands continue the process of flushing the cache starting with the first sector after the
sector in error.
This command is used by the host to request the device to flush the write cache. If there is data in the write
cache, that data shall be written to the media. The BSY bit shall remain set to one until all data has been
successfully written or an error occurs.
10.7 Format track (50h)
This command writes the desired head and cylinder of the selected drive with a vendor unique data pattern
(typically FFh or 00h). To remain host backward compatible, the CompactFlash TM Storage 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 CompactFlash TM Storage Card. If LBA=1 then the number
of sectors to format is taken from the Sec Cnt register (0=256). The use of this command is not recommended.
Table 62: Format track
Task File Register
7
6
5
4
3
2
1
0
COMMAND
50h
DRIVE/HEAD
nu
L
nu
D
H[3:0] or LBA[27:24] of the starting
sector/LBA
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Cylinder[15:8] or LBA[23:16] of the first sector/LBA
Cylinder[7:0] or LBA[15:8] of the first sector/LBA
nu
Sector Count (LBA only)
nu
10.8 Identify Device (ECh)
The Identify Device command enables the host to receive parameter information from the Card. This command
has the same protocol as the Read Sector(s) command. Table 63 defines the Identify Device command Byte
sequence. All reserved bits or Words are zero.
Identify Device table shows the definition of each field in the Identify Drive Information.
Table 63: Identify Device
Task File Register
7
6
5
4
3
2
1
0
COMMAND
ECh
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.00
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-440_data_sheet_CF-HxBU_Rev100.doc
Page 60 of 102
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