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:
Mar. 31, 1992
Filed:
Dec. 20, 1988
Hiroshi Yokouchi, Tokyo, JP;
Electric Industry Co. Ltd., , US;
Abstract
A microprocessor having a word data memory has a CPU data bus, an address register, an incrementer, a first byte data memory circuit, a second byte data memory circuit, a data input switching circuit and a data output switching circuit. The address register stores all the bit information of an address on the CPU data bus in response to a latching signal. The incrementer receives an address specifying signal as well as a logical product. The first byte data memory circuit provides a logical addition. The second byte data memory circuit receives an address specifying output. The data input switching circuit selectively transfers both word writing and byte writing data into the first and second byte data memory circuits. The data output switching circuit selectively transfers both word and byte data from the memory circuits to the CPU data bus.