SST55LD019C-45-I-MVWE View Datasheet(PDF) - Silicon Storage Technology

Part Name

Description

Manufacturer

SST55LD019C-45-I-MVWE

ATA Flash Disk Controller

Silicon Storage Technology 

Data Sheet

11.2.1.25 Security-Unlock- F2H

ATA Flash Disk Controller

SST55LD019A / SST55LD019B / SST55LD019C

Bit ->

7

6

5

4

3

2

1

0

Command (7)

F2H

C/D/H (6)

X

Drive

X

Cyl High (5)

X

Cyl Low (4)

X

Sec Num (3)

X

Sec Cnt (2)

X

Feature (1)

X

This command requests transfer of a single sector of data from the host. Table 11-6 defines the content

of this sector of information. If the identifier bit is set to Master and the device is in high security level,

then the password supplied is compared with the stored Master password. If the device is in the

maximum security level, then the unlock command will be rejected. If the identifier bit is set to user, then

the device compares the supplied password with the stored User password. If the password compare

fails, the device returns “command aborted” to the host and decrements the unlock counter. This

counter is initially set to five and is decremented for each password mismatch when Security-Unlock is

issued and the device is locked. Once this 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.

11.2.1.26 Seek - 7XH

Bit ->

7

6

5

4

3

2

1

0

Command (7)

7XH

C/D/H (6)

1

LBA

1

Drive

Head (LBA 27-24)

Cyl High (5)

Cylinder High (LBA 23-16)

Cyl Low (4)

Cylinder Low (LBA 15-8)

Sec Num (3)

X (LBA 7-0)

Sec Cnt (2)

X

Feature (1)

X

This command is effectively a no operation, 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.

©2006 Silicon Storage Technology, Inc.

46

S71241-04-000

12/06

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