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10.21 Read Verify Ext (42h) 48bit LBA
This command is identical to the Read Sector(s) Ext command, except that DRQ is never set and no data is
transferred to the host. When the command is accepted, the CompactFlash TM Storage Card sets BSY.
When the requested sectors have been verified, the CompactFlash TM Storage Card clears BSY and generates an
interrupt. Upon command completion, the Command Block Registers contain the LBA of the last sector verified.
If an error occurs, the Read Verify Command terminates at the sector where the error occurs. The Command Block
Registers contain the LBA of the sector where the error occurred. The Sector Count Register contains the number of
sectors not yet verified.
Table 77: Read Multiple Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
42h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA Mid
LBA Low
SECTOR COUNT
FEATURES
LBA (47:40)
LBA (39:32)
LBA (31:24)
15:8
nu
LBA (23:16)
LBA (15:8)
LBA (7:0)
7:0
nu
10.22 Recalibrate (1Xh)
This command is effectively a NOP command to the Card and is provided
defines the Recalibrate command Byte sequence.
Table 78: Recalibrate
for compatibility purposes. Table 78
Task File Register
7
6
5
4
3
2
1
0
COMMAND
1Xh
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
10.23 Request Sense (03h)
This command requests extended error information for the previous command. Table 79 defines the Request
Sense command Byte sequence. Table 80 defines the valid extended error codes. The extended error code is
returned to the host in the Error Register.
Table 79: Request sense
Task File Register
7
6
5
4
3
2
1
0
COMMAND
03h
DRIVE/HEAD
1
LBA
1
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 75 of 102
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