SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
A receive DATA port error, as indicated by the MCASP_RSTAT[7] RDMAERR bit, occurs when the DMA or device CPU reads more words from the DATA port of the MCASP than it should.
The MCASP_RSTAT[7] RDMAERR bit indicates that the DMA or device CPU read too many words from the MCASP DATA port for a given receive RINT event. Reading too few words results in a receiver overrun error setting the MCASP_RSTAT[0] ROVRN bit.
While RDMAERR occurs infrequently, an occurrence indicates a serious loss of synchronization between the MCASP and the DMA or device CPU. The MCASP receiver and the DMA must be reinitialized to resynchronize them.