Information processing device and information processing method

An information processing device comprising:

• a master device and a slave device structured to communicate with each other;
• a state notification line connected between the master device and the slave device being structured to perform a state notification of the master device;
• and
• a communication line connected between the master device and the slave device structured to transmit and receive a command and data;
• wherein the master device comprises:
• a state notification part structured to perform the state notification to the slave device through the state notification line corresponding to a state change;
• and
• a command transmission part structured to await restoration of the state change and, when the state change is restored, transmit the command to the slave device for making execute processing corresponding to the state change through the communication line;
• and
• wherein the slave device comprises:
• a state notification detection part structured to set a notification detection flag when the state notification detection part detects the state notification from the master device through the state notification line;
• and
• a state processing execution part structured to await the command from the master device without immediately executing processing corresponding to the state change when the state notification detection part detects the state notification and, when the state processing execution part receives the command, in a case that the notification detection flag has been set, the state processing execution part is structured to perform the processing corresponding to the state change and, in a case that the notification detection flag has not been set, the state processing execution part does not perform the processing corresponding to the state change.