ELECTRONIC DEVICE WITH CPU AND INTERRUPT RELAY STAGE

摘要

An electronic device with a CPU configured to be switched from a low power mode into a higher power mode in response to an interrupt and an interrupt relay coupled between an interrupt generator and the CPU. A functional stage is coupled to the interrupt relay and functionally linked with the interrupt so as to be used during the second mode of the CPU. The interrupt relay relays the received interrupt to the CPU only after a time needed for the functional stage to settle. Power is saved because the CPU is not powered while waiting for the functional stage to settle.