Semiconductor integrated circuit with shutoff control for plural power domains

摘要

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.

主权项

1. A semiconductor device comprising:
a first circuit configured to receive power from a first power source, the first circuit including a shutoff control circuit configured to output a first control signal after power supply from the first power source is stopped, and a second circuit configured to receive power from a second power source, the second circuit coupled with the first circuit for at least transmitting a first transmission signal to the first circuit, the second circuit including a first signal shutoff circuit configured to shut off the first transmission signal in accordance with the first control signal, wherein the first circuit is configured to control the second power source.