Set Features (Efh); Figure 98 Set Features Command (Efh) - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

2.5 inch ata/ide hard disk drive
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14.34 Set Features (EFh)

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 98 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 or hard reset, the device is set to the following features as default.
Write cache
ECC bytes
Read look-ahead
Reverting to power on defaults
Address Offset mode
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
09H
Enable Address Offset mode
42H
Enable Automatic Acoustic Management feature set
44H
52 bytes of ECC apply on Read Long/Write Long commands
55H
Disable read look-ahead feature
66H
Disable reverting to power on defaults
Disable write cache
82H
Disable Advanced Power Management (Note.3)
85H
86H
Disable Power-UP in Standby feature set
89H
Disable Address Offset mode
AAH
Enable read look-ahead feature
BBH
4 bytes of ECC apply on Read Long/Write Long commands
C2H
Disable Automatic Acoustic Management feature set
CCH
Enable reverting to power on defaults
Note 1.
When Feature register is 03h (=Set Transfer mode), the Sector Count Register specifies the transfer mechanism. The
upper 5 bits define the type of transfer and the low order 3 bits encode the mode value.
PIO Default Transfer Mode
Travelstar 5K160 (PATA) Hard Disk Drive Specification
7 6 5 4 3 2 1 0
- - - - - - - -
V V V V V V V V
Note.1, 4
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - D - - - -
1 1 1 0 1 1 1 1
3
2
1
0
0
ABT T0N
AM
N
0
V
0
0
: Enable
: 4 bytes
: Enable
: Disable
: Disable
bits
(7:3)
00000
144 / 188
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
Status Register
7
6
5
4
BSY RDY
DF
DSC DRQ COR IDX ERR
0
V
0
-
bits
(2:0)
000
7 6 5 4 3 2 1 0
- - - - - - - -
...See Below...
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
...See Below...
3
2
1
0
-
0
-
V

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