초록 ▼

A digital data processing device includes a bus for transmitting signals (e.g., data and/or address information) between plural functional units (e.g., a central processing unit and a peripheral controller). A first such unit includes first and second processing sections that concurrently apply to t

A digital data processing device includes a bus for transmitting signals (e.g., data and/or address information) between plural functional units (e.g., a central processing unit and a peripheral controller). A first such unit includes first and second processing sections that concurrently apply to the bus complementary portions of like information signals (e.g., longwords containing data). A fault detection element reads the resultant signal from the bus and compares it with at least portions of the corresponding signals originally generated by the processing sections themselves. If there is discrepancy, the fault-detector signals a fault, e.g., causing the unit to be taken off-line. By use of a redundant unit, processing can continue for fault-tolerant operation.

대표청구항 ▼

[ In view of the foregoing, what we claim is:] [1.] A fault detecting digital data processing device comprisingA. bus means for transmitting applied signals between plural functional units,B. a first such functional unit including a first processing section for generating a first signal and for appl

[ In view of the foregoing, what we claim is:] [1.] A fault detecting digital data processing device comprisingA. bus means for transmitting applied signals between plural functional units,B. a first such functional unit including a first processing section for generating a first signal and for applying a portion thereof to said bus means,C. said first functional unit further including a second processing section for generating a second signal and for applying a portion thereof to said bus means, said second signal normally being substantially identical to said first signal,said portion of said second signal applied to said bus means by said second processing section being complementary to said portion of said substantially identical first signal applied to said bus means by the first processing section,said second processing section applying said portion of said second signal to said bus means substantially concurrently with application of said portion of said first signal to said bus means by said first processing section, said portions of said first and second signals so applied to said bus means defining a third signal andD. fault-detection means, coupled to said first and second processing sections and to said bus means, for receiving said third signal from said bus means and for comparing at least portions thereof with corresponding portions of said first signal and of said second signal generated by those respective processing sections,said fault-detection means including means for signaling fault in response to at least selected differences between those compared signal portions.