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8.2 Command Descriptions
8.2.1 Check Power Mode (E5h)
This command checks the power mode.
If the drive is in, going to, or recovering from the Standby Mode, the drive sets BSY, sets the Sector Count
register to 00h, clears BSY, and generates an interrupt.
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.
8.2.2 Download Micro Code (92h)
This command enables the host to alter the drive's Micro-code.
vendor specific.
8.2.3 Device Configuration Overlay (B1h)
The Device Configuration Overlay feature set allows a utility program to modify some of the optional
commands, modes, and feature sets that a device reports as supported in the Identify Device command
response as well as the capacity reported.
identified by the value placed in the Features register. The following table illustrates these features.
Table 8-2 Device Configuration Overlay Feature Register Values
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 Identify command, and
Device Configuration Restore commands shall be aborted by the device. The 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.
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.
Spinpoint M9T Product Manual REV 1.0
Individual Device Configuration Overlay feature set commands are
Value
C0h
C1h
C2h
C3h
00h-BFh,C4h-FFh
The data transferred using this command is
Command
Device Configuration Restore
Device Configuration Freeze Lock
Device Configuration Identify
Device Configuration Set
Reserved
The
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