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:
Feb. 23, 1999
Filed:
Apr. 03, 1997
Michael Thomas Kilpatrick, Cambridge, GB;
Simon Charles Watt, Cambridge, GB;
Guy Larri, Cambridge, GB;
Arm Limited, Cambridge, GB;
Abstract
A data processing system incorporating a cache memory 2 and a central processing unit. A storage control circuit 10 is responsive to a programmable partition setting PartVal to partition the cache memory between instruction words and data words in dependence upon whether the central processing unit 4 indicates with signal I/D whether the word to be stored within the cache memory 2 resulted from an instruction word cache miss or data word cache miss. The cache memory array 2 may have a programmably sized portion locked down so that it is not replaced. The selection within the complementary programmable range where overwriting takes place uses a pseudo random selection technique using pseudo random number generator in the form of a linear feedback shift register triggering incrementing of a counter.