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. 31, 1995
Filed:
Jun. 27, 1994
Shunichi Iwata, Itami, JP;
Toru Shimizu, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A data processor, comprises: a microaddress input selector 252 which, when decoding an instruction code, generates a main microaddress signal 212 corresponding to an operation code part, a submicroaddress signal 218 corresponding to an addressing mode designating part and an address calculation request signal 233 indicating whether address calculation is necessary or not, and selects an address signal corresponding to an operation code part or to an addressing mode designating part responsive to the address calculation request signal 233; and an instruction execution control unit control circuit 256 which controls the microaddress input selector 252; and is capable of executing the instruction having the addressing mode designating part independent from the operation code, rapidly and with a small microprogram size.