Check Power Mode (98H, E5H); Download Micro Code (92H); Device Configuration Overlay (B1H); Table 6-5 Device Configuration Overlay Features Register Values - Samsung SP0401N Product Manual

6.4.1 Check Power Mode (98h, 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.

6.4.2 Download Micro Code (92h)

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

6.4.3 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. Individual Device Configuration Overlay feature set commands are
identified by the value placed in the Features register. Table 6-5 shows these Features register values.

Table 6-5 Device Configuration Overlay Features Register Values

Value
C0h
C1h
C2h
C3h
00h-BFh,
C4h-FFh
The DEVICE CONFIGURATION RESTORE command disables any setting previously made by a DEVICE
CONFIGURATION SET command and returns the content of the IDENTIFY DEVICE command response
to the original settings as indicated by the data returned from the execution of a DEVICE
CONFIGURATION IDENTIFY command.
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, and DEVICE CONFIGURATION RESTORE commands shall be
aborted by the device. The DEVICE CONFIGURATION FREEZE LOCK condition shall be cleared by a
power-down. The DEVICE CONFIGURATION FREEZE LOCK condition shall not be cleared by hardware
or software reset.
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. If a DEVICE CONFIGURATION SET command has been issued
reducing the capabilities, the response to an IDENTIFY DEVICE command will reflect the reduced set of
capabilities, while the DEVICE CONFIGURATION IDENTIFY command will reflect the entire set of
SpinPoint P80 Product Manual Rev. 01
Command
DEVICE CONFIGURATION RESTORE
DEVICE CONFIGURATION FREEZE LOCK
DEVICE CONFIGURATION IDENTIFY
DEVICE CONFIGURATION SET
Reserved
55