5K250 (SATA) OEM Specification
Page 77 of 171
14.2 Device Configuration Overlay (B1h)
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data - - - - - - - - Data - - - - - - - -
Feature 1 0 1 0 V V V V Error ...See Below...
Sector Count - - - - - - - - Sector Count V V V V V V V V
LBA Low - - - - - - - - LBA Low - - - - - - - -
LBA Mid - - - - - - - - LBA Mid V V V V V V V V
LBA High - - - - - - - - LBA High V V V V V V V V
Device - - - - - - - - Device - - - - - - - -
Command 1 0 1 1 0 0 0 1 Status ...See Below...
Error Register Status Register
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
CRC UNC 0 IDN 0 ABT T0N AM
N
BSY RDY DF DSC DRQ COR IDX ERR
0 0 0 0 0 V 0 0 V V 0 - V - 0 V
Table 44 Device Configuration Overlay Command (B1h)
Individual Device Configuration Overlay feature set commands are identified by the value placed in
the Features register. The table below shows these Features register values.
Value Command
C0h DEVICE CONFIGURATION RESTORE
C1h DEVICE CONFIGURATION FREEZE LOCK
C2h DEVICE CONFIGURATION IDENTIFY
C3h DEVICE CONFIGURATION SET
other Reserved
Table 45 Device Configuration Overlay Features register values
14.2.1 DEVICE CONFIGURATION RESTORE (subcommand
C0h)
The DEVICE CONFIGURATION RESTORE command discard any setting previously made by a
DEVICE CONFIGURATION SET command and return 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.
14.2.2 DEVICE CONFIGURATION FREEZE LOCK
(subcommand C1h)
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 are 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 COMRESET or software reset.
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