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:
Sep. 28, 1999
Filed:
Feb. 17, 1998
William L Randolph, Durham, NC (US);
Rhonda Cassada, Hillsborough, NC (US);
Tim Lao, San Jose, CA (US);
Mitsubishi Semiconductor America, Inc., Durham, NC (US);
Abstract
A multi-port memory chip is provided with a DRAM main memory and a SRAM cache memory coupled via a global bus. Two clock pins are arranged on the opposite sides of the chip to supply external clock signals. Input clock buffers are provided near pads associated with the clock pins to produce buffered clock signals. A clock generator arranged on the chip uses the buffered clock signals to generate an internal clock signal for synchronizing memory operations. Four local clock buffers distributed on the memory chip are supplied with the buffered clock signals to produce local clock signals for synchronizing data output from data pins.