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:
Jun. 12, 2001
Filed:
May. 08, 1998
Toshio Seo, Roswell, GA (US);
Jason Eric Waldeck, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
An improved computing system is provided that includes an embedded PCI device without the use of a PCI bridge to isolate the PCI device from the CPU and the system memory devices. This is accomplished by use of synchronous dynamic RAM (SDRAM) as the main memory device for the CPU, and by providing a PCI/SDRAM logic circuit to control the interfacing of the data and control signals between the PCI device, CPU, and SDRAM device. A combined PCI/Host data bus is provided that connects all of the major system components, including the SDRAM device, the CPU, the PCI device(s), and the PCI/SDRAM logic circuit, thereby eliminating the use of two separate buses found in conventional personal computers. By use of the synchronous DRAM, the present invention provides a much more efficient memory system for interfacing with PCI devices, and thereby dramatically increases the memory bandwidth as compared to conventional computing systems that use asynchronous DRAM.