5K320 SATA OEM Specification
137
14.35 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 AM
N
BSY
RDY
DF DSC
DRQ
COR
IDX
ERR
0 0 0 0 0 V 0 0
0 V 0 - - 0 0 V
Table 105 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.
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
ECC bytes : 4 bytes
Read look-ahead : Enable
Reverting to power on defaults : Disable
Device-initiated interface power state
transition
: Disable
Software setting preservation : Enable
Output Parameters To The Device
Feature Destination code for this command
02H Enable write cache (Note.2)
03H Set transfer mode based on value in sector count register
05H Enable Advanced Power Management
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
42H Enable Automatic Acoustic Management feature set
55H Disable read look-ahead feature
66H Disable reverting to power on defaults
82H Disable write cache
85H Disable Advanced Power Management (Note.3)
86H Disable Power-UP in Standby feature set
90H Disable use of Serial ATA feature
AAH Enable read look-ahead feature
C2H Disable Automatic Acoustic Management feature set
CCH Enable reverting to power on defaults
Note 1.
