20.4.2.2.3 LIN Responder Only Transmit

A LIN Responder Only transmit is a response to a header sent by the Commander and is preceded by a receive event. The baud rate is already determined by the reception of the Sync field. The following procedure is used for Responder Only transmit:

1. Configure LIN Responder Only mode by writing ‘0b1011’ to the MODE[3:0] bits.
2. Configure the checksum type by writing C0EN.
3. Set the ON, RXEN and TXEN bits.

Upon reception of the Break, the RXBKIF flag is set. Upon reception of the PID, an RX interrupt is generated regardless of the RXWM[2:0] bits setting.

1. The PID can be read from UxRXB. If a parity mismatch (P0 and P1) has occurred, the PERIF flag will be set.
2. Write the number of bytes to transmit to Parameter 2 (P2[2:0]).
3. Load UxTXB with data to transmit.

After a Sync is received, writing to UxTXB will cause the data and checksum to be transmitted. A TX interrupt will indicate transmission according to the TXWM[2:0] bits setting.