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:
Apr. 08, 1997
Filed:
Jun. 06, 1995
Ann B Nunziata, Cupertino, CA (US);
Apple Computer, Inc., Cupertino, CA (US);
Abstract
A system and method for controlling DRAM is described. According to exemplary embodiments of the present invention, a memory subsystem can be populated by end users with any of a variety of DRAM chips. A memory controller will size each memory bank and determine whether paired memory banks are to be configured as interleaved or non-interleaved based upon the detected DRAM population. Bank selection logic is designed to account for both size and status (interleaved or non-interleaved) when determining which memory bank contains a memory location of interest. Row and column addressing is selected to minimize decoding of an incoming system address and reduce DRAM access time.