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:
Nov. 26, 1991
Filed:
Oct. 06, 1986
Kouji Tanagawa, Tokyo, JP;
Tomoaki Yoshida, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A microcomputer selectively operable in a first mode or a second mode comprises a first read-only memory for storing a first program to be executed in the first mode, a second, programmable read-only memory for storing a second program to be executed in the second mode, an input circuit for inputting the second program to be written in the second read-only memory, an execution circuit for executing the first program or the second program, and a mode control circuit responsive to a mode selection signal for enabling execution of the first program when the mode selection signal designates the first mode and for enabling writing and execution of the second program when the mode selection signal designates the second mode.