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:
Jan. 21, 2003
Filed:
Aug. 25, 1999
Hirotaka Ito, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A write register access circuit comprises data input terminals , 32 pieces of first-stage flip-flops , 16 pieces of second-stage flip-flops connected to the first-stage flip-flops , an OR gate , a flip-flop , a NAND gate , 16 pieces of data selector circuits , 32 pieces of gate circuits , and 32 pieces of data output terminals , and the write register access circuit is connected to a CPU circuit through an interruption request circuit Z. Therefore, when the write register access circuit is included in an LSI, the write register access circuit enables parallel processing between the CPU and the LSI without necessity of matching the instruction word length of the CPU and the bus width of the LSI, providing an internal bus width changing switch, and dealing with the problem at the software end of the CPU. Further, data transfer rate is increased.