AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 160

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

10. Watchdog Timer (WDT)
10.1
10.2
10.3
Figure 10-1. WDT Block Diagram
10.4
9166C–AVR-08/11
OSC32K
Features
Overview
Block Diagram
Product Dependencies
RCSYS
CSSEL
0
1
CEN
Rev: 4.1.0.0
•
•
•
•
•
The Watchdog Timer (WDT) will reset the device unless it is periodically serviced by the soft-
ware. This allows the device to recover from a condition that has caused the system to be
unstable.
The WDT has an internal counter clocked from the system RC oscillator or the 32 KHz crystal
oscillator.
The WDT counter must be periodically cleared by software to avoid a watchdog reset. If the
WDT timer is not cleared correctly, the device will reset and start executing from the boot vector.
In order to use this module, other parts of the system must be configured correctly, as described
below.
Watchdog Timer counter with 32-bit counter
Timing window watchdog
Clocked from system RC oscillator or the 32 KHz crystal oscillator
Configuration lock
WDT may be enabled at reset by a fuse
CLK_CNT
PB
CLK_CNT Domain
PB Clock Domain
32-bit Counter
WDTCLR
CLR
SYNC
CLEARED
WINDOW,
SR
Watchdog
Detector
PSEL, TBAN
EN, MODE,
CTRL
AT32UC3C
Watchdog
Reset
160