Device Configuration Overlay (B1H); Figure 42 Device Configuration Overlay Command (B1H); Figure 43 Device Configuration Overlay Features Register Values - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

2.5 inch ata/ide hard disk drive
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14.2

Device Configuration Overlay (B1h)

Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
7
6
5
4
CRC UNC
0
IDN
0
0
0
0

Figure 42 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
C0h
DEVICE CONFIGURATION RESTORE
C1h
DEVICE CONFIGURATION FREEZE LOCK
C2h
DEVICE CONFIGURATION IDENTIFY
C3h
DEVICE CONFIGURATION SET
other
Reserved

Figure 43 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 hardware or software reset.
14.2.3 DEVICE CONFIGURATION IDENTIFY (subcommand
C2h)
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,
Travelstar 5K160 (PATA) Hard Disk Drive Specification
7 6 5 4 3 2 1 0
- - - - - - - -
1 0 1 0 V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - D - - - -
1 0 1 1 0 0 0 1
3
2
1
0
0
ABT T0N
AM
N
0
V
0
0
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
Status Register
7
6
5
BSY RDY
DF
V
V
0
Command
95 / 188
7 6 5 4 3 2 1 0
- - - - - - - -
...See Below...
V V V V V V V V
- - - - - - - -
V V V V V V V V
V V V V V V V V
- - - - - - - -
...See Below...
4
3
2
1
DSC DRQ COR IDX ERR
-
V
-
-
0
V

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