Appliance model identification encoding

Details Appliance model identification encoding Appliance model identification encoding

G - Physics

05

B

G05B 19/08 (2006.01) G05B 19/042 (2006.01) G06F 9/44 (2006.01)

Patent

CA 2082789

9D-RG-18070 APPLIANCE MODEL IDENTIFICATION ENCODING ABSTRACT OF THE DISCLOSURE A microprocesser-based controller for an appliance such as a microwave oven is able to control a number of different models having different cooking characteristics. The user-operable keypanel is unique to each model, and a scanned matrix keyboard on the keypanel is encoded in a manner consistent with conventional scanned matrix keyboard techniques to identify to the controller the particular model. A scanned matrix keyboard includes a set of drive lines and set of sense lines intersecting the drive lines. In one embodiment disclosed herein, one or more sense lines are added that are uniquely connected to the existing drive lines depending on the particular model being encoded. The added sense lines are read to determine the model. In another embodiment, one or more drive lines are added, similarly connected to existing sense lines depending on the particular model being encoded.

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