Control circuit with recovery protection

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371 16, 371 19, 358903, G06F 1128

Patent

active

046566040

ABSTRACT:
A stand-alone functional apparatus comprises a plurality of processing circuits which operate under the control of status data applied by a control circuit and possibly apply status data to the control circuit, more specifically a television receiver with the control circuit in the form of a microcomputer. To protect this microcomputer against external disturbance, a plurality of addressable nonvolatile memory locations are present in which auxiliary status data for at least one processing circuit are stored. A program store comprises a plurality of control programs and also a recovery program. The latter is made operative in response to a disturbance, causing the auxiliary status data to be applied to the relevant processing circuit(s). To enable the determination of a disturbance at least one of the control programs includes a check program.

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