47.7.8.2 Receiving Data with FIFO Enabled
When the Receive FIFO is enabled, MCSPI_RDR access reads the FIFO.
When data are present in the Receive FIFO (RDRF flag set to ‘1’), the exact number of data can be checked with MCSPI_FLR.RXFL. All the data can be read successively in MCSPI_RDR without checking the RDRF flag between each access.
