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

 201

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

SCB_CFSR

Access: Read-write

Reset: 0x000000000

This is part of 

0: No instruction access violation fault.

1: The processor attempted an instruction fetch from a location that does not permit execution. 

This fault occurs on any access to an XN region, even when the MPU is disabled or not present.

When this bit is 1, the PC value stacked for the exception return points to the faulting instruction. The processor has not written a 
fault address to the SCB_MMFAR register.

This is part of 

0: No data access violation fault.

1: The processor attempted a load or store at a location that does not permit the operation.

When this bit is 1, the PC value stacked for the exception return points to the faulting instruction. The processor has loaded the 
SCB_MMFAR register with the address of the attempted access.

This is part of 

0: No unstacking fault.

1: Unstack for an exception return has caused one or more access violations.

This fault is chained to the handler. This means that when this bit is 1, the original return stack is still present. The processor has 
not adjusted the SP from the failing return, and has not performed a new save. The processor has not written a fault address to 
the SCB_MMFAR register.

This is part of 

0: No stacking fault.

1: Stacking for an exception entry has caused one or more access violations. 

When this bit is 1, the SP is still adjusted but the values in the context area on the stack might be incorrect. The processor has not 
written a fault address to SCB_MMFAR register. 

31

30

29

28

27

26

25

24

–

DIVBYZERO

UNALIGNED

23

22

21

20

19

18

17

16

–

NOCP

INVPC

INVSTATE

UNDEFINSTR

15

14

13

12

11

10

9

8

BFRVALID

–

STKERR

UNSTKERR

IMPRECISERR

PRECISERR

IBUSERR

7

6

5

4

3

2

1

0

MMARVALID

–

MLSPERR

MSTKERR

MUNSTKERR

–

DACCVIOL

IACCVIOL