Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO Data Sheet

42023E–SAM–07/2013

Name: CLR

Write-only

Offset: 0x004

0x00000000

When the Watchdog Timer is enabled, this Register must be periodically written within the window time frame or within the
watchdog timeout period, to prevent a watchdog reset.

This field must be written twice, first with key value 0x55, then 0xAA, for a write operation to be effective. 

Writing a zero to this bit has no effect.

Writing a one to this bit clears the WDT counter.

31

30

29

28

27

26

25

24

KEY

23

22

21

20

19

18

17

16

-

-

-

-

-

-

-

-

15

14

13

12

11

10

9

8

-

-

-

-

-

-

-

-

7

6

5

4

3

2

1

0

-

-

-

-

-

-

-

WDTCLR