at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 109
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at91sam9260-cj
Manufacturer Part Number
at91sam9260-cj
Description
At91 Arm Thumb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet
1.AT91SAM9260-CJ.pdf
(790 pages)
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16. Watchdog Timer (WDT)
16.1
16.2
Figure 16-1. Watchdog Timer Block Diagram
6221G–ATARM–31-Jan-08
Description
Block Diagram
WDRSTT
WDT_CR
read WDT_SR
or
reset
write WDT_MR
The Watchdog Timer can be used to prevent system lock-up if the software becomes trapped in
a deadlock. It features a 12-bit down counter that allows a watchdog period of up to 16 seconds
(slow clock at 32.768 kHz). It can generate a general reset or a processor reset only. In addition,
it can be stopped while the processor is in debug mode or idle mode.
WDT_MR
WDD
WDERR
<= WDD
set
reset
reload
WDT_MR
WDV
12-bit Down
1
WDUNF
Counter
Current
Value
= 0
reset
set
0
1/128
reload
WDRSTEN
WDT_MR
WDT_MR
WDFIEN
SLCK
AT91SAM9260
(to Reset Controller)
wdt_int
wdt_fault
109
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