SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
In Semi-CPU mode, DMA controller is also utilized to perform data patterns transfer to PSA Signature Register (MCRC_PSA_SIGREGL1-4). Instead of performing signature verification automatically, the CRC controller generates an compression complete interrupt to CPU after each sector is compressed. Upon responding to the interrupt the CPU performs the signature verification by reading the calculated signature stored at the PSA Sector Signature Register (MCRC_PSA_SECSIGREGL1-4) and compare it to a pre-determined CRC value.