Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
880
 TXEMPTY: Transmitter Empty
0: There are characters in UART_THR, or characters being processed by the transmitter, or the transmitter is disabled.
1: There are no characters in UART_THR and there are no characters being processed by the transmitter.
 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.