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US 9,430,310 B2Granted
Watchdog timer and control method therefor
AssigneeRenesas Electronics Corporation
InventorHideo Isogai
Life of this patent
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Abstract
A watchdog timer including a first register that stores a first overflow time, a second register that stores a second overflow time, a detector and a counter that continues to count a clock signal to the first overflow time. When the detector detects an execution of a program for a flash memory, the counter clears a count value and continues to count the clock signal to the second overflow time.
Claims13
A watchdog timer, comprising:
- a first register that stores a first overflow time;
- a second register that stores a second overflow time;
- a detector that detects an execution of program for a flash memory;
- a counter that continues to count a clock signal to the first overflow time;
- and
- a counter clear controller that clears a count value of the counter in response to a request from one of the detector and a central processing unit (CPU),
- wherein when the request is generated by the detector, the counter continues to count the clock signal to the second overflow time after the clearing of the count value.
4 more elements
Dependencies are inferred from the claim text.