CAM circuit structure with low power consumption and high capacity

Abstract

The invention provides a CAM circuit structure with low power consumption and high capacity. The existing CAM circuit structure is changed, the working process of the large-capacity CAM is divided into several pipeline stages, searching, addressing and latching are sequentially carried out in a partition mode, finally, all addressing results are coded in a unified mode, and then result addresses are generated and output, so that the transient large power consumption of the CAM is distributed in the multiple pipeline stages, and the instantaneous high current requirement on a chip power supply network is reduced. The structure has important application value in the large-scale low-power SoC using the CAM IP.

Description

technical field [0001] The invention relates to the field of microelectronic technology and memory, in particular to a CAM circuit structure with low power consumption and large capacity. Background technique [0002] As a content-addressable memory, a CAM circuit inevitably consumes a large amount of power while having a high search efficiency. Especially for a CAM circuit with a large capacity, the problem of transient power consumption is particularly prominent, which may cause damage to the IP itself or The power integrity of the entire SoC has serious impact. In the existing CAM design technology, in order to improve the access speed of the circuit, the three processes of data search, matching result generation and matching address encoding are generally placed in the same clock cycle, and the matching query operation is aimed at the entire memory array. If The capacity of the memory is relatively large, and since all the memory cells discharge to the matching line at ...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem of large instantaneous power consumption in the high-speed search of content-addressable memory CAM (content accessible memory) in the prior art, the present invention provides a low-power consumption and large-capacity CAM circuit structure. The circuit structure of search is optimized, so that the transient large power consumption of CAM is distributed in multiple pipeline stages, so as to reduce the instantaneous high current requirement of the chip power supply network

Images