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:
May. 03, 2016
Filed:
Jul. 26, 2013
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Wataru Ochiai, Yokohama, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/02 (2006.01); G06F 12/14 (2006.01); G06F 13/18 (2006.01);
U.S. Cl.
CPC ...
G06F 12/14 (2013.01); G06F 13/18 (2013.01);
Abstract
A memory control circuit is configured to take a priority for each transfer instruction into account but not the priority in a memory access unit, and thus processing of a high-priority transfer instruction received during a memory access needs to wait for a long time. The memory control apparatus divides the received transfer instruction into a memory access unit and, when the transfer instruction having a higher priority is received during the memory access, the memory access based on a low-priority transfer instruction is interrupted and starts the memory access based on the high-priority transfer instruction.