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:
Sep. 07, 2004
Filed:
Oct. 24, 2001
Applicant:
Inventors:
Masayuki Konishi, Tokyo, JP;
Takehiko Shimomura, Tokyo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/300 ;
U.S. Cl.
CPC ...
G06F 1/300 ;
Abstract
In a memory access device, a memory address space of a Random Access Memory (RAM) is divided into blocks BK to BKn having continuous address areas. Address buses and data buses of a Central Processing Unit (CPU) and a Real Time Debugger (RTD) are connected to each of the blocks BK to BKn. The memory access control circuit checks whether memory blocks accessed by the CPU and the RTD are the same. The memory access control circuit permits simultaneous access by the CPU and the RTD to the memory blocks when the memory block accessed by the CPU and the RTD are not same.