SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
The Rx FIFO blocking mode is the default operation mode for the Rx FIFOs. It is configured by the MCAN_RXFnC[31] FnOM = 0.
If an Rx FIFO full condition is reached (MCAN_RXFnS[21-16] FnPI = MCAN_RXFnS[13-8] FnGI), no further messages are written to the corresponding Rx FIFO until at least one message has been read out and the Rx FIFO Get Index has been incremented. An Rx FIFO full condition is signalled by the MCAN_RXFnS[24] FnF = 1 and interrupt flag MCAN_IR[2] RF0F/MCAN_IR[6] RF1F is set.
In case a message is received while the corresponding Rx FIFO is full, this message is rejected and the message lost condition is signalled by MCAN_RXFnS[25] RFnL = 1 and interrupt flag MCAN_IR[3] RFnL/MCAN_IR[25] RFnL is set.