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:
Mar. 24, 2020
Filed:
Jul. 11, 2017
Qualcomm Incorporated, San Diego, CA (US);
Ramasamy Adaikkalavan, Morrisville, NC (US);
Harish Shankar, Raleigh, NC (US);
Rajesh Kumar, Raleigh, NC (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Systems and methods for cache invalidation, with support for different modes of cache invalidation include receiving a matchline signal, wherein the matchline signal indicates whether there is a match between a search word and an entry of a tag array of the cache. The matchline signal is latched in a latch controlled by a function of a single bit mismatch clock, wherein a rising edge of the single bit mismatch clock is based on delay for determining a single bit mismatch between the search word and the entry of the tag array. An invalidate signal for invalidating a cacheline corresponding to the entry of the tag array is generated at an output of the latch. Circuit complexity is reduced by gating a search word with a search-invalidate signal, such that the gated search word corresponds to the search word for a search-invalidate and to zero for a Flash-invalidate.