34.7.10.16 LIN Frame Handling with the PDC

The USART can be used in association with the PDC in order to transfer data directly into/from the on- and off-chip memories without any processor intervention.

The PDC uses the trigger flags, TXRDY and RXRDY, to write or read into the USART. The PDC always writes in the Transmit Holding register (FLEX_US_THR) and it always reads in the Receive Holding register (FLEX_US_RHR). The size of the data written or read by the PDC in the USART is always a byte.