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:
Oct. 12, 1993
Filed:
Sep. 27, 1991
James F Herrmann, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A memory controller (18) for controlling a multiplexed-address memory (14) includes a programmable timer (22) whose time-out period can be controlled by the memory-access device (12) to which the memory controller (18) provides memory access. During an idle period after a memory access, the controller's memory operator (20) keeps the row-address-strobe signal asserted, and thereby permits page-mode addressing on the next cycle, until the counter (22) times out, at which point the memory operator (20) releases the row- address-strobe line and thereby initiates the pre-charge operation that is required before a row-address change. The memory access device (12) can thus change the time for which the row-address-strobe signal is kept asserted after a cycle to different values for different applications that it is running. The memory-access device (12) can thus optimize, on an application-specific basis, the compromise between the pre-charge penalties of page misses and the column-address-only benefits of page hits.