Fujitsu MHT2020AT Product Manual page 137

(25) STANDBY (X'96' or X'E2')
Upon receipt of this command, the device sets the BSY bit of the Status register
and enters the standby mode. The device then clears the BSY bit and generates an
interrupt. If the device has already spun down, the spin-down sequence is not
implemented.
By using this command, the APS (Automatic Power Standby) timer function is
enabled and the timer starts the countdown when the device returns to idle mode.
If the device has not received any command during specified period, then the
device enters standby mode automatically.
Under the standby mode, the spindle motor is stopped. Thus, when the command
involving a seek such as READ SECTOR(s) command is received, the device
processes the command after driving the spindle motor.
At command issuance (I/O registers setting contents)
1F7 (CM)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (FR)
H
At command completion (I/O registers contents to be read)
1F7 (ST)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (ER)
H
C141-E192-01EN
X'96' or X'E2'
x x x DV
xx
xx
xx
Period of timer
xx
Status information
x x x DV
xx
xx
xx
xx
Error information
5.3 Host Commands
xx
xx
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