Samsung 100737108-A

Spinpoint M8-DVR OEM Product Manual REV 1.0

This command checks the power mode.

If the drive is in, going to, or recovering f rom the Standby Mode, the drive sets BSY, sets the Sector Count

If the drive is in the Idle Mode, the drive sets BSY, sets the Sector Count register to FFh, clears BSY, and

generates an interrupt.

This command enables the host to alter the drive’s Micro-code. The data transferred using this command is

vendor specific.

The Device Configuration Overlay feature set allows a utility program to modify some of the optional

commands, modes, and feature sets th at a device reports as supported in the Identify Device command

response as well as the capacity reported. Individual Device Configuration Overlay feature set commands are

identified by the value placed in the Features register. The following table illustrates these features.

Table 8-2 Device Configuration Overlay Feature Register Values

Value

Command

C0h

Device Configuration Restore

C1h

Device Configuration Freeze Lock

C2h

Device Configuration Identify

C3h

Device Configuration Set

00h-BFh,C4h-FFh

Reserved

The Device Configuration Restore command disables any setting previously made by a Device.

The Device Configuration Freeze Lock command prevents accidental modification of the Device

Configuration Overlay settings. After successful execution of a Device Configuration Freeze Lock Command, all

Device Configuration Set, Device Configuration Freeze Lock, Device Configuration Identif y command, and

Device Configuration Restore commands shall be aborted by the device. Th e Device Configuration Freeze Lock

condition will be cleared only after a power-down.

The Device Configuration Identify command returns a 512 byte data structure via PIO data-in transfer. The

content of this data structure indicates the selectable commands, modes, and feature sets that the device is capable

of supporting. Should a Device Configuration Set command be issued reducing the capabilities, the response to a

Device Configuration Identify command will reflect the reduced set of capabilities accordingly.