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Associative Search Circuitry: Bit Patterns and Hit Indicators Using Logic Gates

This document explores the design and functionality of associative search circuitry, which utilizes various logic gates including AND, OR, and XOR to identify specific bit patterns within data sets. It focuses on the mechanisms involved in searching for particular bit patterns, data items, and hit indicators, as well as the role of tag blocks and block select lines in this process. This overview will provide insights into how these components interact to facilitate efficient data retrieval and tagging in associative memory systems.

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Associative Search Circuitry: Bit Patterns and Hit Indicators Using Logic Gates

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  1. Legend 1 bit cell AND gate OR gate XOR gate Circuitry for Associative Search bit pattern being searched for ●●● ●●● ●●● data items being searched ●●● ●●● ●●● hit indicator

  2. tag being searched for ●●● ●●● ●●● ●●● ●●● ●●● block select line ●●● ●●● ●●● ●●● tags Legend cache hit indicator 1 bit cell AND gate tag block frame OR gate XOR gate Associative Cache block select line ●●● block select line block select line block frames

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