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10.23 Security Freeze Lock (F5h)
The Security Freeze Lock command sets the CF card to Frozen mode. After command completion, any other
commands that update the CF card Lock mode are rejected. Frozen mode is disabled by power off or hardware
reset. If Security Freeze Lock is issued when the CF card is in Frozen mode, the command executes and the CF card
remains in Frozen mode. After command completion, the Sector Count Register shall be set to 0.
Commands disabled by Security Freeze Lock are:
? Security Set Password
? Security Unlock
? Security Disable Password
? Security Erase Unit
If security mode feature set is not supported, this command shall be handled as Wear Level command.
Table 83: 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
10.24 Security Set Password (F1h)
This command requests a transfer of a single sector of data from the host. Table 85 defines the content of the
sector of information. The data transferred controls the function of this command.
Table 86 defines the interaction of the identifier and security level bits.
Table 84: Security Set Passwor d
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 85: 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
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 72 of 101
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