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:
Jan. 01, 2013
Filed:
Nov. 22, 2011
Jerrold Richard Randell, Waterloo, CA;
Richard C. Madter, Puslinch, CA;
Karin Werder, Kitchener, CA;
Jerrold Richard Randell, Waterloo, CA;
Richard C. Madter, Puslinch, CA;
Karin Werder, Kitchener, CA;
Research In Motion Limited, Waterloo, CA;
Abstract
A memory controller interface, mobile device and method are provided. The memory controller interface can allow a processor designed and configured to operate with NOR flash and static random access memory SRAM devices to instead operate using NAND flash and synchronous dynamic random access memory SDRAM. The system accomplishes this by caching sectors out of NAND flash into SDRAM, where the data can be randomly accessed by the processor as though it were accessing data from NOR flash/SRAM. Sectors containing data required by the processor are read out of NAND flash and written into SDRAM, where the data can be randomly accessed by the processor. Boot code is stored in memory accessible to the processor and is read out of the memory for execution. The boot code is scanned for a predetermined signature, and if the predetermined signature is found, a portion of the memory is write-protected.