Verfahren und Schaltungsanordnung zur Überwachung der Funktion einer programmgesteuerten Schaltung

摘要

In order to monitor the correct functioning of a microprocessor, microcontroller or other program-controlled circuit (1 - 5; 15), data processing results (W1) with data (W2) produced in a monitoring circuit (7 - 14; 17 - 30) independently of the monitored circuit and of the program flow are checked at preset intervals for deviations. If deviations indicative of a fault are found, a cut-out signal (Aus) is generated. To that end, data words or a data word sequence (W1) are produced during the program flow of the monitored circuit (1 - 5; 15) and forwarded to the monitoring circuit (7 - 14; 17 - 30) at predetermined times (T1). The monitoring circuit is used to monitor the content of the data words (W1) and the appearance at the predetermined times (T1) of the data words (W2).