FUJITSU MHK2090AT - Manual (Page 148)

5.3 Host Commands
C141-E088-03EN 5-75
At command issuance (I-O register contents)
1F7
h
(CM) 1 1 1 1 0 0 0 1
1F6
h
(DH)
Ч Ч Ч
DV xx
1F5
h
(CH)
1F4
h
(CL)
1F3
h
(SN)
1F2
h
(SC)
1F1
h
(FR)
xx
xx
xx
xx
xx
At command completion (I-O register contents)
1F7
h
(ST) Status information
1F6
h
(DH)
Ч Ч Ч
DV xx
1F5
h
(CH)
1F4
h
(CL)
1F3
h
(SN)
1F2
h
(SC)
1F1
h
(ER)
xx
xx
xx
xx
Error information
(35) SECURITY UNLOCK
This command cancels LOCKED MODE.
The host transfers the 512-byte data shown in Table 5.12 to the device. Operation
of the device varies as follows depending on whether the host specifies the master
password.
• When the master password is selected
When the security level is LOCKED MODE is high, the password is
compared with the master password already set. If the passwords are the
same, LOCKED MODE is conceled. Otherwise, the Aborted Command error
is returned. If the security level in LOCKED MODE is set to the highest
level, the Aborted Command error is always returned.
• When the user password is selected
The password is compared with the user password already set. If the
passwords are the same, LOCKED MODE is conceled. Otherwise, the
Aborted Command error is returned.
If the password comparison fails, the device decrements the UNLOCK counter.
The UNLOCK counter initially has a value of five. When the value of the
UNLOCK counter reaches zero, this command or the SECURITY ERASE UNIT
command causes the Aborted Command error until te device is turned off and
then on, or until a hardware reset is executed. Issuing this command with