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6.18 Security Erase Unit (F4h)
This command requests transfer of a single sector of data from the host. Table 34 defines the content of this
sector of information. If the password does not match the password previously saved by the CFAST card, the
CFAST 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 CFAST Card receives a Security Erase Unit
command without an immediately prior Security Erase Prepare command, the CFAST card aborts the Security
Erase Unit command.
Table 36: 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
6.19 Security Freeze Lock (F5h)
The Security Freeze Lock command sets the CFAST card to Frozen mode. After command completion, any other
commands that update the CFAST card Lock mode are rejected. Frozen mode is disabled by power off or
hardware reset. If Security Freeze Lock is issued when the CFAST card is in Frozen mode, the command executes
and the CFAST 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 37: 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
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.41
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
F-100_data_sheet_CA-HxBR_Rev141.doc
Page 27 of 51
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