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:
Feb. 25, 1997
Filed:
Nov. 23, 1994
Keiichi Yoshioka, Sanda, JP;
Shinichi Yamaura, Kobe, JP;
Kazuhiko Hara, Ikeda, JP;
Takao Katayama, Ikeda, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A general-purpose register group circuit provided in a data processing system includes a plurality of register groups connected to a first bus and a second bus, data being written into the plurality of register groups via the first bus according to a first control signal and being read therefrom via the second bus according to a second control signal. An output register group is connected to the plurality of register groups via the first and second buses. The data read from the plurality of register groups is written into the output register group according to a third control signal, and data read from the output register group is sent to an inner bus of the data processing system according to a fourth control signal. Each of the plurality of register groups includes a plurality of unit registers, each of which registers includes a first part for setting the second bus to either a high-impedance state or a reference level according to data latched therein and the second control signal. The output register group includes a second part for driving the inner bus according to a state of the second bus.