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. 23, 1996
Filed:
Aug. 15, 1994
James A Komarek, Newport Beach, CA (US);
Clarence W Padgett, Westminster, CA (US);
Scott B Tanner, Irvine, CA (US);
Shin-ichi Kojima, Amagasaki, JP;
Jack L Minney, Irvine, CA (US);
Motohiro Oishi, Irvine, CA (US);
Keiji Fukumura, Hyougo, JP;
H Nakanishi, Hyougo, JP;
Creative Integrated Systems, Inc., Santa Ana, CA (US);
Rocoh Company, Ltd., Tokyo, JP;
Abstract
The invention is a dynamic ROM design for read cycle interrupts. The clock scheme of the improved memory generates a primary start clock. The relatively long pulse time of START when high is provided for setting the latches. This pulse duration is controlled by PCOK or OWDN one shot circuit. When an address interrupt occurs early in the read cycle, while PCOK or OWDN clock is low, and START is high, these one shot circuits provide a simple means of restarting the cycle by continuing the precharge phase of the cycle with no effect on most of the secondary clocks in the memory. Only those clocks relating to the new address inputs are effected by the early interrupt. This results in less power dissipation and less bus noise.