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10.20 Security Disable Password (F6h)
This command requests a transfer of a single sector of data from the host. Table 79 defines the content of this
sector of information. If the password selected by word 0 matches the password previously saved by the device,
the device disables the lock mode. This command does not change the Master password that may be reactivated
later by setting a User password.
Table 79: Security Disable Password
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F6h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Table 80: Security Password Data Content
nu
nu
nu
nu
nu
Word
0
1-16
17-255
Content
Control word
Bit 0: identifier
0=compare User password
1=compare Master password
Bit 1-15: Reserved
Password (32 bytes)
Reserved
10.21 Security Erase Prepare (F3h)
This command shall be issued immediately before the Security Erase Unit command to enable device erasing and
unlocking. This command prevents accidental erase of the CF card.
Table 81: Security Erase Prepar e
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F3h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
10.22 Security Erase Unit (F4h)
This command requests transfer of a single sector of data from the host. Table 80 defines the content of this
sector of information. If the password does not match the password previously saved by the CF card, the CF card
rejects the command with command aborted. The Security Erase Prepare command shall be completed
immediately prior to the Security Erase Unit command. If the CF Card receives a Security Erase Unit command
without an immediately prior Security Erase Prepare command, the CF card aborts the Security Erase Unit
command.
Table 82: Security Erase Unit
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F4h
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: 1.20
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-320_data_sheet_CF-HxBO_Rev120.doc
Page 71 of 101
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