Idle (E3H/97H) - Hitachi HTS542525K9SA00 Specifications

12.11 Idle (E3h/97h)

Table 90: Idle command (E3h/97h)
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
The Idle command causes the device to enter Idle mode immediately and to set the auto power down time-out
parameter (standby timer). And the timer then starts counting down.
When the Idle mode is entered, the device is spun up to operating speed. If the device is already spinning, the spin
up sequence is not executed.
During Idle mode the device is spinning and is ready to respond to host commands immediately.
Output parameters to the device
Sector Count
mode automatically if the time-out interval expires with no drive access from the host. The time-out interval will be
reinitialized if there is a drive access before the time-out interval expires
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - -
V V V V V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 0 0 0 1 1
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
Time-out Parameter. If it is zero, the automatic power down sequence is disabled. If it is
nonzero, the automatic power down sequence is enabled. The time-out interval is shown
below:
Value Time-out
0 Timer disabled
1-240 Value x 5
241-251 (Value-240) x 30 minutes
252 21 minutes
253 8 hours
254 21 minutes 10 seconds
255 21 minutes 15 seconds
When the automatic power down sequence is enabled, the drive will enter Standby
Deskstar 7K160 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0 7 6
BSY RDY DF DSC DRQ
0 0 V
164
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
5 4 3 2
COR IDX
0 V - 0
1 0
ERR
- V