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:
Aug. 19, 2008
Filed:
Sep. 30, 2002
Tatsuya Kamei, Kokubunji, JP;
Masayuki Ito, Kokubunji, JP;
Tatsuya Kamei, Kokubunji, JP;
Masayuki Ito, Kokubunji, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A data processor arranged so that a block transfer control unit () can initiate block transfer in response to the execution of a particular instruction by a CPU, in order to increase the speed and efficiency of the data transfer between a CPU-accessible internal memory () and an external memory (). When an address specified by the addressing field coincides with an address mapped to the internal memory, the particular instruction sets a logical address as one of the transfer source or transfer destination addresses of the data block transfer. The internal memory is allotted to a part of virtual address space; the internal memory allotted so is associated with the physical address space, to which the external memory set as the other address is allotted, by a process in which a TLB is used when the MMU is in ON, and a given register is used when the MMU is in OFF.