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counter reaches zero, the Security Unlock and Security Erase Unit commands are command aborted until after a
power-on reset or a hardware reset is received. Security Unlock commands issued when the device is unlocked
have no effect on the unlock counter.
Table 49: Security Unlock
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F2h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
nu
nu
nu
nu
6.31 Seek (7Xh)
This command is effectively a NOP command to the Drive although it does perform a range check of cylinder and
head or LBA address and returns an error if the address is out of range. Table 50 shows the Seek command Byte
sequence.
Table 50: Seek
Task File Register
7
6
5
4
3
2
1
0
COMMAND
7Xh
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Cylinder High (LBA23:16)
Cylinder Low (LBA15:8)
nu (LBA7:0)
nu
nu
6.32 Set Features (EFh)
This command is used by the host to establish or select certain features. If any subcommand input value is not
supported or is invalid, the CFAST card returns command aborted.
Table 51: Set Features
Task File Register
7
6
5
4
3
2
1
0
COMMAND
EFh
DRIVE/HEAD
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
D
nu
nu
nu
Config
Feature
nu
Table 52: Features Supported
Feature
01h/81h
02h/82h
03h
05h/85h
09h/89h
0Ah/8Ah
55h/AAh
66h/CCh
69h
96h
97h
9Ah
BBh
Operation
Enable/Disable 8-bit data transfers.
Enable/Disable write cache.
Set transfer mode based on value in Sector Count register.
Enable/Disable advance power management.
Enable/Disable extended power operations.
Enable/Disable power level 1 commands.
Disable/Enable Read Look Ahead.
Disable/Enable Power On Reset (POR) established of defaults at Soft Reset.
NOP Accepted for backward compatibility.
NOP Accepted for backward compatibility.
Accepted for backward compatibility. Use of this Feature is not recommended.
Set the host current source capability.
Allows trade-off between current drawn and read/write speed.
4 bytes of data apply on Read/Write Long commands
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 0.92
CH-9552 Bronschhofen
Switzerland
F-240_data_sheet_CA-HxBV_Rev092.doc
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