Watchdog system for data and address buses of data processing system - has module with memories and registers for test data and reference values for comparison

摘要

An electronic system of the type used in the control of prodn. processes has a processing unit (VE) coupled to a bus (SYB) that can be configured for serial or parallel transmissions. Also coupled to the bus are a watchdog module (VE) and a number of other units (E1,E2,E3). The watchdog contains memories (P1-P4) stoving test data. Registers (R1-R2) provide locations for obtained data. The processor can read test data and the contents of the registers and perform a comparison process to identify faults in the communication process. ADVANTAGE - Continuous monitoring of data and address bus.