Atmel Evaluation Kit AT91SAM9X35-EK AT91SAM9X35-EK Data Sheet
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Product codes
AT91SAM9X35-EK
150
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
17.5.3 Watchdog Timer Status Register
Name:
WDT_SR
Address:
0xFFFFFE48
Access:
Read-only
• WDUNF: Watchdog Underflow
0: No Watchdog underflow occurred since the last read of WDT_SR.
1: At least one Watchdog underflow occurred since the last read of WDT_SR.
• WDERR: Watchdog Error
0: No Watchdog error occurred since the last read of WDT_SR.
1: At least one Watchdog error occurred since the last read of WDT_SR.
Note:
Note:
The WDD and WDV values must not be modified within a period of time of 3 slow clock periods following a restart of
the watchdog performed by means of a write access in the WDT_CR register, else the watchdog may trigger an end
of period earlier than expected.
the watchdog performed by means of a write access in the WDT_CR register, else the watchdog may trigger an end
of period earlier than expected.
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
–
–
–
–
–
–
WDERR
WDUNF