SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The MPU subsystem implements a local PRCM (MPU_PRCM) module to handle the local Cortex-A15 CPU power domains, along with the corresponding L1 cache. The MPU_PRCM module includes two power-management control (PSCON) modules to control the power chains for MPU_C0 and MPU_C1. The PRM_PSCON_COUNT register is used for that control purpose.
In addition to the standard power-management technique supported in the device, the MPU subsystem also employs an SR3-APG (SmartReflex3 automatic power gating) power-management technology to reduce leakage. This technology allows for full logic and memories retention on MPU_C0 and MPU_C1 and is controlled by the MPU_PRCM. The SR3-APG power-management can be enabled by setting the PRM_PSCON_COUNT[24] HG_EN bit. For more information about how to enable SR3-APG fast-wakeup, see Section 4.3.7.6, SR3-APG Technology Fail-Safe Mode.