LM3S2965-IQC20-A0T Luminary Micro, Inc., LM3S2965-IQC20-A0T Datasheet - Page 235

• Manufacturer Part Number: LM3S2965-IQC20-A0T
• Description: Microcontroller
• Manufacturer: Luminary Micro, Inc.

11
11.1
11.2
June 04, 2007
Watchdog Timer
A watchdog timer can generate nonmaskable interrupts (NMIs) or a reset when a time-out value is
reached. The watchdog timer is used to regain control when a system has failed due to a software
error or due to the failure of an external device to respond in the expected way.
The Stellaris
register, interrupt generation logic, a locking register, and user-enabled stalling.
The Watchdog Timer can be configured to generate an interrupt to the controller on its first time-out,
and to generate a reset signal on its second time-out. Once the Watchdog Timer has been configured,
the lock register can be written to prevent the timer configuration from being inadvertently altered.
Block Diagram
Figure 11-1. WDT Module Block Diagram
Functional Description
The Watchdog Timer module consists of a 32-bit down counter, a programmable load register,
interrupt generation logic, and a locking register. Once the Watchdog Timer has been configured,
the Watchdog Timer Lock (WDTLOCK) register is written, which prevents the timer configuration
from being inadvertently altered by software.
System Clock
Interrupt
®
Watchdog Timer module consists of a 32-bit down counter, a programmable load
Control / Clock /
Generation
WDTLOCK
WDTTEST
Interrupt
WDTCTL
WDTMIS
WDTICR
WDTRIS
WDTPCellID0
WDTPCellID1
WDTPCellID2
WDTPCellID3
Preliminary
Identification Registers
WDTPeriphID0
WDTPeriphID1
WDTPeriphID2
WDTPeriphID3
0x00000000
WDTPeriphID4
WDTPeriphID5
WDTPeriphID6
WDTPeriphID7
32-Bit Down
Comparator
WDTLOAD
Counter
LM3S2965 Microcontroller
WDTVALUE
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