计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
8期
31-34,107
,共5页
伪随机测试%最大距离测试%预定距离测试%低功耗测试%生成矩阵
偽隨機測試%最大距離測試%預定距離測試%低功耗測試%生成矩陣
위수궤측시%최대거리측시%예정거리측시%저공모측시%생성구진
pseudo-random testing%maximum distance testing%predetermined distance testing%lower power testing%gene-ration matrix
伪随机测试在数字系统的故障测试中已经得到了多年的应用，但传统的伪随机测试存在着效率比较低的缺陷。针对该缺陷提出了在伪随机测试方法中引入测试码之间距离的概念。根据测试码之间距离越大，能检测到不同故障的数目概率也越大的假设，基于测试码之间距离的随机测试法（简称基于距离测试法）可以生成一组测试码序列。但是由于基于距离测试法所生成的测试码相邻间距离的变大，将造成相邻输入码之间的跳变次数增多，使得输入测试码时所需要的功耗急剧增大。针对该情况，提出对伪随机测试法生成的测试码输入顺序进行重新排序和调整的概念，从而达到降低测试功耗的最终目标。
偽隨機測試在數字繫統的故障測試中已經得到瞭多年的應用，但傳統的偽隨機測試存在著效率比較低的缺陷。針對該缺陷提齣瞭在偽隨機測試方法中引入測試碼之間距離的概唸。根據測試碼之間距離越大，能檢測到不同故障的數目概率也越大的假設，基于測試碼之間距離的隨機測試法（簡稱基于距離測試法）可以生成一組測試碼序列。但是由于基于距離測試法所生成的測試碼相鄰間距離的變大，將造成相鄰輸入碼之間的跳變次數增多，使得輸入測試碼時所需要的功耗急劇增大。針對該情況，提齣對偽隨機測試法生成的測試碼輸入順序進行重新排序和調整的概唸，從而達到降低測試功耗的最終目標。
위수궤측시재수자계통적고장측시중이경득도료다년적응용，단전통적위수궤측시존재착효솔비교저적결함。침대해결함제출료재위수궤측시방법중인입측시마지간거리적개념。근거측시마지간거리월대，능검측도불동고장적수목개솔야월대적가설，기우측시마지간거리적수궤측시법（간칭기우거리측시법）가이생성일조측시마서렬。단시유우기우거리측시법소생성적측시마상린간거리적변대，장조성상린수입마지간적도변차수증다，사득수입측시마시소수요적공모급극증대。침대해정황，제출대위수궤측시법생성적측시마수입순서진행중신배서화조정적개념，종이체도강저측시공모적최종목표。
Random testing has been long employed for testing of faults in digital systems. However, there are some fatal defects of it due to its low efficiency in testing. Aiming at this problem, a new concept of distance between test patterns is proposed. It is known that the larger distance between two test patterns the more different faults can be detected by these two patterns. Therefore, a new pseudo-random testing is proposed earlier called distance based random testing which can be more efficient in testing than that of traditional one. On the other hand, since the distance between two patterns in this method is large enough so that the power dissipation of applying test sequence is greatly increased when testing. This paper is just to present a novel way of changing the order of test patterns in the sequence when applying the tests so as to reduce the power dissipation as much as possible to reach the objective of lowering the power dissipation in testing.
