Datasheet

741
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
TXBUFE: Transmission Buffer Empty
0: The buffer empty signal from the transmitter PDC channel is inactive.
1: The buffer empty signal from the transmitter PDC channel is active.
RXBUFF: Receive Buffer Full
0: The buffer full signal from the receiver PDC channel is inactive.
1: The buffer full signal from the receiver PDC channel is active.