Fujitsu MHG2102AT - Mobile 10 GB Hard Drive Product Manual page 127

Interface
1F7
1F6
1F5
1F4
1F3
1F2
1F1
1F7
1F6
1F5
1F4
1F3
1F2
1F1
(27) SLEEP (X'99' or X'E6')
This command is the only way to make the device enter the sleep mode.
Upon receipt of this command, the device sets the BSY bit of the Status register
and enters the sleep mode. The device then clears the BSY bit and generates an
interrupt. The device generates an interrupt even if the device has not fully entered
the sleep mode.
In the sleep mode, the spindle motor is stopped and the ATA interface section is
inactive. All I/O register outputs are in high-impedance state.
The only way to release the device from sleep mode is to execute a software or
hardware reset.
5-54
At command issuance (I/O registers setting contents)
(CM) X'94' or X'E0'
H
(DH)
H
(CH) xx
H
(CL) xx
H
(SN) xx
H
(SC) xx
H
(FR) xx
H
At command completion (I/O registers contents to be read)
(ST) Status information
H
(DH)
H
(CH) xx
H
(CL) xx
H
(SN) xx
H
(SC) xx
H
(ER) Error information
H
DV xx
DV xx
C141-E070-01EN