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Table 45: Security Freeze Lock
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F5h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
6.29 Security Set Password (F1h)
This command requests a transfer of a single sector of data from the host. Table 47 defines the content of the
sector of information. The data transferred controls the function of this command.
Table 46: Security Set Password
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F1h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Table 47: Security Set Password Data Content
nu
nu
nu
nu
nu
Word
0
1-16
17-255
Content
Control word
Bit 0: identifier
0=set User password
1=set Master password
Bit 1-7: Reserved
Bit 8: Security level
0=High
1=Maximum
Bits 9-15: Reserved
Password (32 bytes)
Reserved
Table 48: Identifier and Security Level Bit Interaction
Identifier Level
Command result
User
High
The password supplied with the command shall be saved as the new User password. The lock mode
shall be enabled from the next power-on or hardware reset. The CFAST card shall then be unlocked
by either the User password or the previously set Master password.
User
Maximum The password supplied with the command shall be saved as the new User password. The lock mode
shall be enabled from the next power-on or hardware reset. The CFAST card shall then be unlocked
by only the User password.
The Master password previously set is still stored in the CFAST card shall not be used to unlock the
CFAST card.
Master
High or
This combination shall set a Master password but shall not enable or disable the Lock mode. The
Maximum security level is not changed.
6.30 Security Unlock (F2h)
This command requests transfer of a single sector of data from the host. Table 42 defines the content of this
sector of information. If the identifier bit is set to Master and the device is in high security level, then the
password supplied shall be compared with the stored Master password. If the device is in the maximum security
level, then the unlock command shall be rejected. If the identifier bit is set to user, then the device compares
the supplied password with the stored User password. If the password compare fails then the device returns
command aborted to the host and decrements the unlock counter. This counter is initially set to five and is
decremented for each password mismatch when Security Unlock is issued and the device is locked. Once this
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Revision: 0.92
CH-9552 Bronschhofen
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F-240_data_sheet_CA-HxBV_Rev092.doc
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