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:
Oct. 19, 1982
Filed:
Jan. 30, 1980
Applicant:
Inventors:
Kazuyuki Kubo, Katsuta, JP;
Shigenobu Katagiri, Katsuta, JP;
Assignee:
Hitachi Koki Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 51 ; 364200 ;
Abstract
A microcomputer which controls a device or apparatus in accordance with a control program prestored in a Read Only Memory included in the microcomputer, further comprises a Random Access Memory for storing parity bits of the control program. The data indicative of the control program prestored in the Read Only Memory are read out in sequence and are fed to a central processing unit of the microcomputer so that parity bits of the prestored data are produced and then stored in the Random Access Memory. The parity bits stored in the Random Access Memory are used to check whether the prestored data are correct or not.