Serial ATA Flash Drive

AP-SAFD254QAxxxxS-XXHT

20

©2011 Apacer Technology Inc.

Rev. 1.5

2.1.16 Security Freeze Lock (F5h)

Causes the drive to enter Frozen mode. Once this command has been executed, the following commands to

update a lock result in the Aborted Command error:

SECURITY SET PASSWORD

SECURITY UNLOCK

SECURITY DISABLE PASSWORD

SECURITY ERASE PREPARE

SECURITY ERASE UNIT

The drive exits from Frozen mode upon a power-off or hard reset. If the SECURITY FREEZE LOCK command

is issued when the drive is placed in Frozen mode, the drive executes the command, staying the Frozen mode.

2.1.17 Security Set Password (F1h)

This command sets user password or master password. The host outputs sector data with PIO data-out

protocol to indicate the information defined in the following table.

2.1.18 Security Unlock (F2h)

This command disables LOCKED MODE of the device. This command transfers 512 byte of data from the

host with PIO data-out protocol. The following table defines the content of this information.

2.1.19 Seek (7xh)

This command is effectively a NOP command to the device although it does perform a range check.

2.1.20 Set Features (EFh)

This command set parameter to Features register and set drive’s operation. For transfer mode, parameter is

set to Sector Count register. This command is used by the host to establish or select certain features.

Features register Value and settable operating mode

Value

Function

02h

Enable write cache

03h

Set transfer mode based on value in Sector Count register.

55h

Disable read look-ahead feature

82h

Disable write cache

AAh

Enable read look-ahead feature

2.1.21 Set Multiple Mode (C6h)

This command enables the device to perform READ MULTIPLE and WRITE MULTIPLE operations and

establishes the block count for these commands.

2.1.22 Sleep (E6h)

This command causes the device to set BSY, enter the Sleep mode, clear BSY and generate an interrupt.