Patent ID: 7624215
Filing Date: 2009-11-24
Classification: G06F,Y02D

Abstract:
1. An interrupt controller for managing interrupt requests, comprising: interrupt control circuitry in a first domain, said first domain being switchable to a low-power mode; and interrupt request monitoring circuitry in a second domain; said interrupt control circuitry comprising interrupt inputs for receiving interrupt requests and being configured to selectively output a received interrupt request to data processing logic; wherein said interrupt control circuitry is responsive to a low power request signal received by said interrupt controller to communicate interrupt select information to said interrupt request monitoring circuitry prior to said first domain being switched to a low power mode, said interrupt select information identifying interrupt requests which indicate exit from said low power mode; said interrupt request monitoring circuitry comprises a select information store configured to store said select information communicated to said interrupt request monitoring circuitry by said interrupt control circuitry; and said interrupt request monitoring circuitry comprises interrupt inputs for receiving said interrupt requests, and is responsive to a received interrupt request identified by said stored interrupt select information as indicating exit from said low power mode to trigger switching of said first domain out of said low power mode.