FUJITSU MCM3064AP - Manual (Page 102)

Host Interface
4-32 C156-E227-01EN
4.5.4 CHECK POWER MODE (E5h)
Table 4.22 CHECK POWER MODE command
Bit
7 6 5 4 3 2 1 0
CM 1 1 1 0 0 1 0 1
DH X X X DRV X X X X
CH X X X X X X X X
CL X X X X X X X X
SN X X X X X X X X
SC X X X X X X X X
FR X X X X X X X X
The CHECK POWER MODE command sets the ODD power mode status in the
SC register, then notifies the host of the value in Table 4.23. When the drive is in
sleep mode, the interface is inactive and the ODD cannot receive this command.
Table 4.23 Power mode indication
Power mode status SC register
Standby mode 00h
Entering standby mode 00h
Returning from standby mode 00h
Idle mode FFh
Active mode FFh