The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1981
Filed:
Feb. 16, 1979
David J Schmidt, Holland, MI (US);
Robertshaw Controls Company, Richmond, VA (US);
Abstract
A microprocessor based household appliance electronic control device is equipped with self-diagnosing cacapability and with selected option capabilities. The control includes input and output lines from an integrated circuit structure through a plug connection to external circuitry. The input/output line appearances from the microprocessor in the plug connection may be decoupled from external circuitry and cross connected to each other by means of a dummy plug. Connection to the dummy plug automatically establishes a test mode of operation for the microprocessor to cycle through a testing sequence to diagnosis internal and external failures. Error codes are provided in a visual display indicative of different types of failures. The controller is also equipped with function altering circuits which are selectively connected or bypassed with strapping diodes. Customized control features are thereby achieved in a universal electronic controller.