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Host Interface
4-22 C156-E205-01EN
ND - A non data command
PI - A PIO data-in command
4.5.1 CHECK POWER MODE (E5h)
Table 4.18 CHECK POWER MODE command
Bit
76543210
CM11100101
DHXXXDEVXXXX
CHXXXXXXXX
CLXXXXXXXX
SNXXXXXXXX
SCXXXXXXXX
FRXXXXXXXX
The CHECK POWER MODE command sets the ODD power mode status in the
SC register, then notifies the host of the value in Table 4.19 When the drive is in
sleep mode, the interface is inactive and the ODD cannot receive this command.
Table 4.19 Power mode indication
Power mode status SC register
Standby mode 00h
Entering standby mode 00h
Returning from standby mode 00h
Idle mode 80h
Pre-idle mode FFh
Active mode FFh