Set Features (Efh); Figure 131. Set Features Command (Efh) - IBM IC35L040AVVN07-0 - 40GB IDE Deskstar 120GXP 7200RPM UATA-100 07N9682 Specifications

11.29 Set Features (EFh)

Command Block Output
Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 131. Set Features Command (EFh)

The Set Feature command establishes 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.
Output parameters to the device
Feature
02H
03H
05H
06H
07H
09H
42H
44H
55H
5DH
66H
82H
7 6 5 4 3 2 1 0
- - - - - - - -
V V V V V V V V
Note 1
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 0 1 1 1 1
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
Destination code for this command
Enable write cache
Set transfer mode based on value in sector count register
Enable Advanced Power Management
Enable Power-up in Standby feature set
Power-up in Standby feature set device spin-up
Enable Address Offset mode
Enable Automatic Acoustic Management
52 bytes of ECC apply on Read Long/Write Long commands
Disable read look-ahead feature
Enable release interrupt
Disable reverting to power on defaults
Disable write cache
Deskstar 120GXP hard disk drive specifications
Command Block Input
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V 0
153
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
4 3 2 1
DSC DRQ COR IDX ERR
– – 0 –
0
V