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:
Nov. 18, 2008
Filed:
Apr. 11, 2005
Kazuya Taniguchi, Kasugai, JP;
Toshiyuki Nishii, Kasugai, JP;
Hiromichi Mizuno, Kasugai, JP;
Tsutomu Terazawa, Kasugai, JP;
Kazuya Taniguchi, Kasugai, JP;
Toshiyuki Nishii, Kasugai, JP;
Hiromichi Mizuno, Kasugai, JP;
Tsutomu Terazawa, Kasugai, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
There are provided a buffer circuit buffers data between a synchronous circuit and an asynchronous circuit, and a control method therefor. There are also provided an interface circuit that controls data transfer between a synchronous memory circuit and the asynchronous circuit, and a control method therefor, which are used in the buffer circuit and the control method therefor. A data buffer circuit that is interposed between an image processing system and a main system includes a one-port RAM, a control signal generating section, an subsequent cycle address generating section, and a first selector. The first selector selectively outputs the present cycle address to an address of the one-port RAM when an access to the one-port RAM is a write access, and selectively outputs the subsequent cycle address to the address of the one-port RAM when the access to the one-port RAM is a read access.