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. 29, 2011
Filed:
Jun. 18, 2009
Tomohiro Koganezawa, Chiba, JP;
Takeshi Shimoyama, Tokyo, JP;
Kingo Koyama, Tokyo, JP;
Takuji Himeno, Chiba, JP;
Tomohiro Koganezawa, Chiba, JP;
Takeshi Shimoyama, Tokyo, JP;
Kingo Koyama, Tokyo, JP;
Takuji Himeno, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
A memory access control apparatus includes a memory controller controlling a memory adopting a DDR format; a DDR-PHY adjusting the timing of an interface signal between the memory controller and the memory; a DDR-PHY controller controlling the DDR-PHY; and a clock controller controlling the frequency of a clock signal. A first request signal for controlling the operation of the memory in a self-refresh mode is supplied to the memory controller, a second request signal for resetting the DDR-PHY is supplied to the DDR-PHY controller, a third request signal for changing the clock frequency is supplied to the clock controller, a fourth request signal for setting a parameter for the DDR-PHY is supplied to the DDR-PHY controller, and a fifth request signal for canceling the operation of the memory in the self-refresh mode is supplied to the memory controller in order to change the clock frequency of the memory.