Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 619

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

Name: SPI_SR

0x40008010

Read-only  

0 = No data has been received since the last read of SPI_RDR

1 = Data has been received and the received data has been transferred from the serializer to SPI_RDR since the last read of 
SPI_RDR.

0 = Data has been written to SPI_TDR and not yet transferred to the serializer.

1 = The last data written in the Transmit Data Register has been transferred to the serializer. 

TDRE equals zero when the SPI is disabled or at reset. The SPI enable command sets this bit to one.

0 = No Mode Fault has been detected since the last read of SPI_SR.

1 = A Mode Fault occurred since the last read of the SPI_SR.

0 = No overrun has been detected since the last read of SPI_SR.

1 = An overrun has occurred since the last read of SPI_SR.

An overrun occurs when SPI_RDR is loaded at least twice from the serializer since the last read of the SPI_RDR.

0 = The Receive Counter Register has not reached 0 since the last write in SPI_RCR

.

.

0 = The Transmit Counter Register has not reached 0 since the last write in SPI_TCR

1 = The Transmit Counter Register has reached 0 since the last write in SPI_TCR

 has a value other than 0.

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

SPIENS

15

14

13

12

11

10

9

8

–

–

–

–

–

UNDES

TXEMPTY

NSSR

7

6

5

4

3

2

1

0

TXBUFE

RXBUFF

ENDTX

ENDRX

OVRES

MODF

TDRE

RDRF