A constantly power-ON domain and a standby-time power OFF domain are included on the same chip, and the constantly power-ON domain includes: a shutoff control circuit shutting off a signal inputted and outputted between the constantly power-ON domain and the standby-time power OFF domain when the first power source is ON and the second power source is OFF; and a shutoff control circuit outputting a first control signal indicating that shutoff of an emergent shutoff control circuit unit is to be enabled or disabled, the standby-time power OFF domain includes the emergent shutoff control circuit unit shutting off, based on the first control signal from the shutoff control circuit, the signal inputted between the emergent shutoff control circuit unit and the constantly power-ON domain.