Fujitsu MPG3XXXAH Product Manual page 115

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
(27) CHECK POWER MODE (X'98' or X'E5')
The host checks the power mode of the device with this command.
The host system can confirm the power save mode of the device by analyzing the contents of the
Sector Count and Sector Number registers.
The device sets the BSY bit and sets the following register value. After that, the device clears the
BSY bit and generates an interrupt.
Power save mode
• During moving to standby mode
• Standby mode
• During returning from the standby mode
• Idle mode
• Active mode
5 - 48
Status information
DV xx
xx
xx
xx
xx
Error information
Sector Count register
X'00'
X'FF'
X'FF'
C141-E112-01EN
Sector Number register
N/A
X'00'
X'FF'