An apparatus is disclosed that includes a processing sub-system having a plurality of processor circuits and an interrupt control circuit. The interrupt control circuit is configured to, in response to a peripheral interrupt, initiate performance of a task indicated by the peripheral interrupt by at least one of the plurality of processor circuits. The processing sub-system is configured to generate a power-down control signal in response to suspension of the plurality of processor circuits. A power management circuit disables power to the processing sub-system, including the interrupt control circuit, in response to the power-down control signal. The power management circuit enables power to the processing sub-system in response to a power-up control signal. The apparatus also includes a proxy interrupt control circuit configured to generate the power-up control signal in response to receiving a peripheral interrupt and power to the processing sub-system being disabled.