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:
Jul. 29, 1997
Filed:
Apr. 11, 1995
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric Semiconductor Software Co., Ltd., Hyogo, JP;
Abstract
A microcomputer or a one-chip computer has address pins and data pins provided separately, and when a specified control signal is provided, the address pins act as multiplex pins for address and data signals. Further, a combination of bits for address signals and bits for data signals to be provided to the multiplex pins are changed according to a width of an external bus. For example, the data bits D.sub.i are combined with the address bits A.sub.i, as used previously. Further, the data bits D.sub.i-1 are combined with the address bits A.sub.i by shifting by one bit with respect to the address bits. One of the two types of the combination can be selected. If the microcomputer has 16-bit address pins, it can be connected to 8-bit memories having independent address and data pins, while it can also be connected to 8-bit peripherals having multiplex pins without using an external circuit for separating address and data signals.