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0J11285
Z5K500 OEM Specifications
133
14.36 Set Features (EFh)
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
V V V V V V V V Error
...See Below...
Sector
Count
Note.1
Sector
Count
- - - - - -
-
-
LBA
Low
- - - - -
-
-
- LBA
Low
- - - - - -
-
-
LBA
Mid
- - - - -
-
-
- LBA
Mid
- - - - - -
-
-
LBA
High
- - - - -
-
-
- LBA
High
- - - - - -
-
-
Device
- - - - -
-
-
- Device
- - - - - -
-
-
Command
1 1 1 0 1 1 1 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 AMN BSY RDY
DF
DSC DRQ COR IDX ERR
0 0 0 0 0 V 0 0
0 V 0 - - 0 0 V
Table 106 Set Features Command (EFh)
The Set Feature command is to establish the following parameters which affect the execution of certain
features as shown in below table.
features as shown in below table.
ABT will be set to 1 in the Error Register if the Feature register contains any undefined values.
After power on reset, the device is set to the following features as default.
Write cache
: Enable
Read look-ahead
: Enable
Reverting to power on defaults
: Disable
Device-initiated interface power state
transition
transition
: Disable
Software setting preservation
: Enable
Output Parameters To The Device
Feature
Feature
Destination code for this command
02H
Enable write cache (Note.2)
03H
Set transfer mode based on value in sector count register
06H
Enable Power-Up in Standby feature set
07H
Power-Up in Standby feature set device spin-up
10H
Enable use of Serial ATA feature
41H
Enable Free-fall Control feature set (Note 4)
55H
Disable read look-ahead feature
66H
Disable reverting to power on defaults
82H
Disable write cache
86H
Disable Power-UP in Standby feature set
90H
Disable use of Serial ATA feature
AAH
Enable read look-ahead feature
C1H
Disable Free-fall Control feature set (Note 4)
CCH
Enable reverting to power on defaults