Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

857

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

UART_SR

0xF8040014 (0), 0xF8044014 (1)

Read-only 

0 = No character has been received since the last read of the UART_RHR or the receiver is disabled. 

1 = At least one complete character has been received, transferred to UART_RHR and not yet read. 

0 = A character has been written to UART_THR and not yet transferred to the Shift Register, or the transmitter is disabled.

1 = There is no character written to UART_THR not yet transferred to the Shift Register.

0 = No overrun error has occurred since the last RSTSTA. 

1 = At least one overrun error has occurred since the last RSTSTA.

0 = No framing error has occurred since the last RSTSTA. 

1 = At least one framing error has occurred since the last RSTSTA.

0 = No parity error has occurred since the last RSTSTA. 

1 = At least one parity error has occurred since the last RSTSTA.

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.

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

–

15

14

13

12

11

10

9

8

–

–

–

–

–

–

TXEMPTY

–

7

6

5

4

3

2

1

0

PARE

FRAME

OVRE

–

–

–

TXRDY

RXRDY