Printing apparatus and method for protecting information in prin

Details Printing apparatus and method for protecting information in prin Printing apparatus and method for protecting information in prin

1998-02-17

1999-12-14

Evans, Arthur G.

395113, G06K 1500

Patent

active

060028467

ABSTRACT:
A printing apparatus and a method for protecting information in a printing apparatus capable of performing a normal operation by restoring valid information even if abnormality occurs in a part of information stored in a non-volatile memory, are provided. This apparatus is equipped with electrically programmable and erasable first and second memory means. This apparatus writes predetermined first information, which the printing apparatus should store, and first check data capable of determining integrity of the first information into the first memory means, writes second information constituted by at least a part of the first information and second check data capable of determining integrity of the second information into the second memory means, reads out the first information and the first check data so as to determine the integrity of the first information, reads out the second information and the second check data so as to determine the integrity of the first information, and rewrites the first information stored in the first memory means and/or the second information stored in the second memory means in accordance with the determination result of the integrity of the first and second information.

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