Data processing with a low power cache access mode

摘要

A processor can operate in three different modes of operation. In an active mode, a first voltage is supplied to the processor, the first voltage being sufficient to allow the processor to execute instructions (402). In a low power mode, a holding voltage is supplied to the processor (408). The processor uses less energy in hold mode than in active mode. Furthermore, the processor may operate in a third mode, providing the processor with a voltage sufficient to allow the processor to process cache messages but not performing any other normal operations or performing normal operations at a very slow speed compared to Can run in active mode (412).