LM3S301 Luminary Micro, Inc, LM3S301 Datasheet - Page 175
LM3S301
Manufacturer Part Number
LM3S301
Description
Lm3s301 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S301.pdf
(366 pages)
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10
10.1
Figure 10-1. WDT Module Block Diagram
July 5, 2006
System Clock
Interrupt
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 Watchdog Timer module consists of a 32-bit down counter, a programmable load
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
Control / Clock /
Generation
WDTLOCK
WDTTEST
WDTCTL
Interrupt
WDTICR
WDTMIS
WDTRIS
WDTPCellID0
WDTPCellID1
WDTPCellID2
WDTPCellID3
Identification Registers
Preliminary
WDTPeriphID0
WDTPeriphID1
WDTPeriphID2
WDTPeriphID3
0x00000000
WDTPeriphID4
WDTPeriphID5
WDTPeriphID6
WDTPeriphID7
32-Bit Down
Comparator
WDTLOAD
Counter
LM3S301 Data Sheet
WDTVALUE
175
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