5.3 Host Commands
At command issuance (I-O register contents)
1F7h(CM) | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |
1F6h(DH) | × | × | × | DV | xx |
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1F5h(CH) | xx |
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1F4h(CL) | xx |
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1F3h(SN) | xx |
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1F2h(SC) | xx |
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1F1h(FR) | xx |
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At command completion
1F7h(ST) | Status information |
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1F6h(DH) | × | × | × | DV | xx |
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1F5h(CH) | xx |
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1F4h(CL) | xx |
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1F3h(SN) | xx |
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1F2h(SC) | xx |
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1F1h(ER) | Error information |
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(35) SECURITY UNLOCK
This command cancels LOCKED MODE.
The host transfers the
∙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
