Tsinghua University

National Yang Ming Chiao Tung University

Keng-Hao Yang

Meng-Fan Chang

Tien-Fu Chen

Yu-Lin Chen

Chia-Yin Li

A tag memory and a cache system with automating tag comparison mechanism and a cache method thereof are provided. The tag memory in the cache system includes a memory cell array, sensing amplifiers and a tag comparison circuit. The memory cell array stores cache tags, and outputs row tags of the cache tags according to an index in a memory address. The sensing amplifiers perform signal amplifications on the row tags to serve as comparison tags. The tag comparison circuit performs parallel comparisons between a target tag in the memory address and the row tags. When one of the row tags matches the target tag, the tag comparison circuit outputs a location of the matched row tag to serve as a first column address. The first column address is a column address where the memory address corresponds to a first data memory in the cache system.

Tag memory and cache system with automating tag comparison mechanism and cache method thereof

The present disclosure provides a memory apparatus including a memory cell array, a plurality of sense amplifiers, at least one first comparing circuit, and a plurality of second comparing circuit. The memory cell array includes a plurality of memory cells. Each of the sense amplifier generates a data signal and an inverted data signal according to a bit line signal and an inverted bit line signal. The first comparing circuits compares the data signals of first and second sense amplifiers with a first tag to generate a first comparing result. The second comparing circuits respectively compare a plurality of second tags with the data signals of the sense amplifiers to respectively generate a plurality of second comparing results.

Growing community of inventors

Chiayi County, Taiwan

Keng-Hao Yang