A Scan Chain Partition and Reordering Technique for Scan Chain Stuck-At Fault Diagnosis
Date Issued
2005
Date
2005
Author(s)
You, Jhih-Kai
DOI
en-US
Abstract
為改善掃描鏈之單一黏著性錯誤之診斷解析度，本研究提出掃描鏈之分割與重排技術。掃描鏈分割技術即將單一條掃描鏈分割為兩條以上。掃描鏈分割技術可藉由解決可控制性問題及可觀察性問題來改善診斷解析度。掃描鏈重排技術即改變掃描正反器之排列順序。掃描鏈重排技術可藉由打斷連續之不可觀察的掃描正反器來改善診斷解析度。為降低掃描鏈重排所造成之繞線增加，本研究亦支援以叢集為基礎之重排技術。實驗結果證明所提出之技術可有效改善診斷解析度。
Scan chain partition and reordering techniques are proposed to improve the diagnosis resolutions of scan chain single stuck-at faults. Scan chain partition separates a scan into two or more chains. Scan chain partition improves diagnosis resolutions by solving controllability problems and observability problems. Scan chain reordering changes the order of scan cells. Scan chain reordering improves diagnosis resolutions by breaking the continuous unobservable scan cells. Cluster-based reordering is supported to improve the scan chain wiring overhead. Experimental results shows the proposed techniques are effective.
Subjects
掃描鏈
分割
重排
叢集
診斷解析度
平均診斷解析度
最差診斷解析度
輸入測試方塊矩陣
輸出響應矩陣
scan chain
partition
reordering
cluster
diagnosis resolution(DR)
average DR
worst DR
ITCM
ORM
Type
thesis
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