SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
Each Arm Cortex-M4 processor has its own memory space, inaccessible by the other processor. In the private memory space are the IPUx_Cx_INTC and RW table registers: CORTEXM4_RW_PID1 and CORTEXM4_RW_PID2. CORTEXM4_RW_PID1 and CORTEXM4_RW_PID2 are accessible only by the respective Cortex-M4 cores (CORTEXM4_RW_PID1 is accessible only by IPUx_C0, while CORTEXM4_RW_PID2 is accessible only by IPUx_C1) . These registers are not accessible from the Cortex-A15 MPU. Because they are not shared, they do not require the bit-band feature (semaphore) to read and write to them.