57.9.6.3 Receiving Data with FIFO Enabled

When the Receive FIFO is enabled, FLEX_TWI_RHR access reads the FIFO.

When data are present in the Receive FIFO (RXRDY flag set to ‘1’), the exact number of bytes can be checked with FLEX_TWI_FLR.RXFL. All the bytes can be read successively in FLEX_TWI_RHR without checking the FLEX_TWI_SR.RXRDY flag between each access.

See figures Receiving Data with FIFO Enabled in Host Mode and Sending/Receiving Data with FIFO Enabled in Client Mode.