SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
A receive DATA port error, as indicated by the RDMAERR flag in the MCASP_RXSTAT register, occurs when the DMA or device CPU reads more words from the DATA port of the McASP than it should.
The MCASP_RXSTAT[7] RDMAERR indicates that the DMA or device CPU read too many words from the McASP DATA port for a given receive AREVT event. Reading too few words results in a receiver overrun error setting ROVRN in MCASP_RXSTAT.
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.