IBM DTCA-24090 Hard Drive Specifications - Page 166

Standby Immediate, E0h/94h

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12.32 Standby Immediate (E0h/94h) Command Block Output Registers Register 76543210 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 1D Command 11100000 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 102. Standby Immediate Command (E0h/94h) The Standby Immediate command causes the device to enter Standby mode immediately. When this command is issued, the device confirms the completion of the cached write commands before asserts INTRQ. Then the device is spun down, but the interface remains active. If the device is already spun down, the spin down sequence is not executed. During the Standby mode, the device will respond to commands, but there is a delay while waiting for the spindle to reach operating speed. The Standby Immediate command will not affect the auto power down timeout parameter. 158 OEM Specifications of DTCA-2xxxx 2.5 inch H D D

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12.32
Standby Immediate
(E0h/94h)
Command Block Output Registers
Command Block Input Registers
Register
76543210
Register
76543210
Data
Data
Feature
Error
...See Below...
Sector Count
Sector Count
Sector Number
Sector Number
Cylinder Low
Cylinder Low
Cylinder High
Cylinder High
Device/Head
1
1D
Device/Head
Command
11100000
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 102. Standby Immediate Command (E0h/94h)
The Standby Immediate command causes the device to enter Standby mode immediately.
When this command is issued, the device confirms the completion of the cached write commands before
asserts INTRQ.
Then the device is spun down, but the interface remains active.
If the device is already spun down, the spin down sequence is not executed.
During the Standby mode, the device will respond to commands, but there is a delay while waiting for the
spindle to reach operating speed.
The Standby Immediate command will not affect the auto power down timeout parameter.
158
OEM Specifications of DTCA-2xxxx 2.5 inch HDD