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. 31, 2022
Filed:
Dec. 04, 2019
Realtek Singapore Private Limited, Singapore, SG;
Ryan Patrick Donohue, Sunnyvale, CA (US);
REALTEK SINGAPORE PRIVATE LIMITED, Singapore, SG;
Abstract
A memory data scrambling system that can dynamically rescramble the contents of a memory while the system is in operation includes an application-specific integrated circuit (ASIC) that has an ASIC bus fabric, a double data rate (DDR) memory controller coupled to the ASIC bus fabric, a dynamic memory scrambler coupled to the DDR memory controller, the dynamic memory scrambler comprising a scrambler, a descrambler, a scrambler selection table, and a key generator and a DDR PHY coupled to the dynamic memory scrambler. The DDR PHY is coupled to an external DDR memory external to the ASIC. The dynamic memory scrambler includes a refresh timer that, upon expiration, causes data in a region of the DDR to be read, descrambled, rescrambled using a different scrambling key, and stored back into the region of the DDR in place of a DDR refresh.