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. 01, 2001
Filed:
Sep. 03, 1997
Terry L. Biggs, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A memory controller (,) controls accesses to a command-based memory device (,) such as a synchronous DRAM. The memory controller (,) uses an address comparator (,) for both base address matching and command generation. When the memory controller (,) detects an access to the memory device (,) and a control register bit is set, a state machine (,) causes the command to be written to the memory device (,). The memory controller (,) thus allows the memory device (,) to be accessed with little additional circuitry, and to be connected to higher order address bits to speed the access. Since the commands are detected by accesses to the same memory locations as reads and writes, the memory controller (,) avoids creating “holes” in the memory map.