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. 19, 2010
Filed:
Nov. 29, 2004
Applicant:
Tetsuya Hirano, Hamamatsu, JP;
Inventor:
Tetsuya Hirano, Hamamatsu, JP;
Assignee:
Kabushiki Kaisha Kawai Gakki Seisakusho, Hamamatsu-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 13/00 (2006.01); G06F 13/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A data processor that allows a CPU to access an external memory in an interval between data accesses from a DSP having a variable data length. In a case where a 24-bit mode is set, when a determination section determines that the DSP is accessing the external memory, a control section commands to place an access from the CPU to the external memory in a wait state. In a case where a 16-bit mode is set, the control section commands an address-data switching section, allowing the CPU to access the external memory by utilizing a third bus cycle, which is free.