SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The PDMA channel will remain idle until data is received from the paired-DMA over the PSIL interface. At this time, the PDMA will imediately start copying packet bytes into the MCAN TX buffer corresponding the PDMA/MCAN channel. The number of bytes copied is smaller of the remaining bytes in the packet or the value of the 'Y' parameter. Once a TX buffer has been filled, the PDMA will transfer ownership of the buffer to MCAN by performing an MCAN register write. The PDMA will then wait to regain ownership of the TX buffer by waiting for the corresponding MCAN TX event. At this time, the PDMA will continue with refilling the TX buffer for the next packet fragment. On subsequent fills (until the end of packet is reached), the PDMA will skip over the 8-byte MCAN header, leaving the original contents from the intial fragment copy in place.