Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD 데이터 시트

SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

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0: The exception is not pending.
1: The exception is pending.

Note: The user can write to these bits to change the pending status of the exceptions.

Read:
0: The exception is not pending.
1: The exception is pending.

Note: The user can write to these bits to change the pending status of the exceptions.

Read:
0: The exception is not active.
1: The exception is active.

Note: The user can write to these bits to change the active status of the exceptions.

- Caution: A software that changes the value of an active bit in this register without a correct adjustment to the stacked content 

can cause the processor to generate a fault exception. Ensure that the software writing to this register retains and subsequently 

restores the current active status.

- Caution: After enabling the system handlers, to change the value of a bit in this register, the user must use a read-modify-write 

procedure to ensure that only the required bit is changed.

0: The exception is not active.
1: The exception is active.

0: Debug monitor is not active.
1: Debug monitor is active.

0: SVC call is not active.
1: SVC call is active.

0: Usage fault exception is not active.
1: Usage fault exception is active.

0: Bus fault exception is not active.
1: Bus fault exception is active.

0: Memory management fault exception is not active.
1: Memory management fault exception is active.

If the user disables a system handler and the corresponding fault occurs, the processor treats the fault as a hard fault.