Idle (E3H/97H); Figure 106. Idle Command (E3H/97H) - IBM IC35L040AVVN07-0 - 40GB IDE Deskstar 120GXP 7200RPM UATA-100 07N9682 Specifications

11.8 Idle (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

Figure 106. Idle Command (E3h/97h)

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 ready to respond to
host commands immediately.
Output parameters to the device
Sector Count 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:
When the automatic power down sequence is enabled, the drive will enter Standby
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 0
IDN 0 ABT T0N AMN
0 0 V 0 0
Value
0
1-240
241-251
252
253
254
255
Deskstar 120GXP hard disk drive specifications
Command Block Input
Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
7 6 5
BSY RDY DF DSC
0 V 0
Time-out
Timer disabled
Value x 5
(Value-240) x 30 minutes
21 minutes
8 hours
21 minutes 10 seconds
21 minutes 15 seconds
123
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
4 3 2 1 0
DRQ COR IDX ERR
V – 0 – V