系统芯片中AMBA总线串扰故障的自测试方法

A Self-Test Approach For Testing Crosstalk Faults in AMBA Bus -Based SoC

系统芯片(SoC)技术的发展使得芯片内总线长度大大增加,芯片速度按照摩尔定律成倍提高(高达GHz),总线间的串扰(Crosstalk)现象也日益严重,因此关于串扰的故障模型和自测试技术越来越受到关注。本文利用最大侵扰故障MAF(Maximal Aggressor Fault)模型,提出了一种SoC芯片中总线串扰故障的自测试方法。利用该方法,SoC芯片中地址、数据和控制总线的串扰故障均得到了测试,实验结果也表明其硬件开销较其它方案大大降低。

Crosstalk effect on interconnects is becoming significant especially in System-on-a-Chip (SoC) architecture in which the length of bus is intensively increased and the operating frequency of the chip reaches the order of GHz by the law of Moor. Some kind of crosstalk fault models and self-test methods are developed. A new crosstalk self-test method using the Maximal Aggressor Fault (MAF) model is proposed in this paper. By means of this method the Crosstalk faults of address bus, data bus and control bus in a SoC chip can be tested. The result also show that the area overhead is also decreased drastically compared with other method.