Abstract
This paper describes a novel TCAM architecture designed for enhancing the soft-error immunity. An associated embedded DRAM and ECC circuits are placed next to TCAM macro to implement a unique methodology of recovering upset bits due to soft errors. The proposed configuration allows an improvement of soft-error immunity by 6 orders of magnitude compared with the conventional TCAM. We also propose a novel testing methodology of the soft-error rate with a fast parallel multi-bit test. In addition, the proposed architecture resolves the critical problem of the look-up table maintenance of TCAM. The design techniques reported in this paper are especially attractive for realizing soft-error immune, high-performance TCAM chips.
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