Atmel SAM4S-EK2 Atmel ATSAM4S-EK2 ATSAM4S-EK2 Data Sheet

 194

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

SCB_SCR

Access: Read-write

Reset: 0x000000000

0: Only enabled interrupts or events can wake up the processor; disabled interrupts are excluded.

1: Enabled events and all interrupts, including disabled interrupts, can wake up the processor.

The processor also wakes up on execution of an SEV instruction or an external event.

Controls whether the processor uses sleep or deep sleep as its low power mode:

0: Sleep.

1: Deep sleep.

Indicates sleep-on-exit when returning from the Handler mode to the Thread mode:

0: Do not sleep when returning to Thread mode.

1: Enter sleep, or deep sleep, on return from an ISR. 

Setting this bit to 1 enables an interrupt-driven application to avoid returning to an empty main application.

31

30

29

28

27

26

25

24

–

23

22

21

20

19

18

17

16

–

15

14

13

12

11

10

9

8

–

7

6

5

4

3

2

1

0

–

SEVONPEND

–

SLEEPDEEP

SLEEPONEXIT

–