IBM DTCA-24090 Hard Drive Specifications - Page 119

Idle, E3h/97h

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12.8 Idle (E3h/97h) Command Block Output Registers Register 76543210 Data Feature Sector Count V V V V V V V V Sector Number Cylinder Low Cylinder High Device/Head 1 1D Command 11100011 Command Block Input Registers Register 76543210 Data Error ...See Below... Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status ...See Below... Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0V 0 V Figure 68. Idle Command (E3h/97h) The Idle command causes the device to enter Idle mode immediatly, and set auto power down timeout parameter(standby timer). And then the timer 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 Timeout Parameter. If zero, the timeout interval(Standby Timer) is N O T disabled, but the timeout interval is set for 109 minutes automatically. If other than zero, the timeout interval is set for (Timeout Parameter × 5) seconds. The device will enter Standby mode automatically if the timeout interval expires with no device access from the host. The timeout interval will be reinitialized if there is a device access before the timeout interval expires. Command Descriptions 111

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12.8 Idle
(E3h/97h)
Command Block Output Registers
Command Block Input Registers
Register
76543210
Register
76543210
Data
Data
Feature
Error
...See Below...
Sector Count
VVVVVVVV
Sector Count
Sector Number
Sector Number
Cylinder Low
Cylinder Low
Cylinder High
Cylinder High
Device/Head
1
1D
Device/Head
Command
11100011
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 AMN
BSY RDY DF
DSC DRQ COR IDX ERR
0
0
0
0
0
V
0
0
0
V
0
V
0
V
Figure 68. Idle Command (E3h/97h)
The Idle command causes the device to enter Idle mode immediatly, and set auto power down timeout
parameter(standby timer). And then the timer 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
Timeout Parameter.
If zero, the timeout interval(Standby Timer) is NOT disabled,
but the timeout interval is set for 109 minutes automatically.
If other than zero, the
timeout interval is set for (Timeout Parameter × 5) seconds.
The device will enter Standby mode automatically if the timeout interval expires with
no device access from the host.
The timeout interval will be reinitialized if there is a
device access before the timeout interval expires.
Command Descriptions
111