57.8.6.3 Receiving Data with FIFO Enabled

When the Receive FIFO is enabled, FLEX_SPI_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 FLEX_SPI_FLR.RXFL. All the data can be read successively in FLEX_SPI_RDR without checking the RDRF flag between each access.