Scan-based state save and restore method and system for inactive state power reduction

摘要

A scan-based state save and restore method and system for inactive state power reduction. An integrated circuit (130) has an inactive state power reduction manager (160), normal circuitry and scan circuitry (150). Upon receipt of a sleep signal, the state of the normal circuitry is accessed by employing scan circuitry (150). The state is then stored in a memory (270). The power is disconnected from the normal circuitry. Upon wake-up, the normal circuitry is re-connected to the power (200). The state of the circuit is accessed from the memory (270) and restored to the normal circuitry by employing scan circuitry (150).