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6.20 Security Set Password (F1h)
This command requests a transfer of a single sector of data from the host. Table 39 defines the content of the
sector of information. The data transferred controls the function of this command.
Table 40 defines the interaction of the identifier and security level bits.
Table 38: 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 39: 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 40: Identifier and Security Level Bit Interaction
Identifier Level
Command result
User
User
Master
High
Maximum
High or
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 either the User password or the previously set Master password.
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.
This combination shall set a Master password but shall not enable or disable the Lock mode. The
security level is not changed.
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 28 of 51
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