63.7.3.9 Multidrop Mode

If the value 0x6 or 0x07 is written to the FLEX_US_MR.PAR field, the USART runs in Multidrop mode. This mode differentiates the data characters and the address characters. Data are transmitted with the parity bit to 0 and addresses are transmitted with the parity bit to 1.

If the USART is configured in Multidrop mode, the receiver sets the PARE parity error bit when the parity bit is high and the transmitter is able to send a character with the parity bit high when a one is written to the FLEX_US_CR.SENDA bit.

To handle parity error, the PARE bit is cleared by writing a one to the FLEX_US_CR.RSTSTA bit.

The transmitter sends an address byte (parity bit set) when the FLEX_US_CR.SENDA bit is written to 1. In this case, the next byte written to FLEX_US_THR is transmitted as an address. Any character written in FLEX_US_THR when the SENDA command is not written is transmitted normally with parity to 0.