Functional lockstep arrangement for redundant processors

Details Functional lockstep arrangement for redundant processors Functional lockstep arrangement for redundant processors

1990-12-07

1993-07-06

Atkinson, Charles E.

Boots, shoes, and leggings

364269, 3642691, 3642707, 371 36, 371 683, G06F 1100

Patent

active

052261522

ABSTRACT:
N redundant processors operating in functional lockstep synchronization for maintaining system integrity. Comparison and synchronization logic are connected between N processors in redundant configuration and peripheral devices. The comparison and synchronization logic act to insure that the redundant processors are performing the same read/write operations. Calculation or processing not requiring access to peripherals may take place in an asynchronous manner. Processors are halted from performing further operations until all appropriate read or write operations are synchronized. The processors are then allowed to proceed. An overall watchdog timer provides for detecting an error condition for non-responsive or lead responding processors.

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patent: 4907232 (1990-03-01), Harper et al.
patent: 4937741 (1990-06-01), Harper et al.
patent: 4945486 (1990-07-01), Nitschke et al.

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