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US 4,538,273 AGranted
Dual input watchdog timer
AssigneeHoneywell Inc.
InventorGeorge A. Lasser
Life of this patent
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Abstract
A dual input watchdog timer for a processor having a dual input circuit with first and second inputs and an output, the first and second inputs receiving signals from different software modules of the processor and the output for supplying a reinitialization signal to the processor if the dual input circuit improperly receives the signals to its inputs within a predetermined amount of time.
Claims9
A dual input watchdog timer for processor means comprising:
- dual input means having first and second inputs and having at least one output;
- input connecting means for connecting said first and second inputs to a processor means such that said inputs receive signals from different software modules of said processor means;
- and,
- output connecting means responsive to said at least one output of said dual input means for providing a reinitialization signal to said processor if said dual input means improperly receives said signals to said inputs within a predetermined amount of time.
1 more element
Dependencies are inferred from the claim text.