An Improved VLSI Test Economics Analysis System - Laboratory for ...
An Improved VLSI Test Economics Analysis System - Laboratory for ... An Improved VLSI Test Economics Analysis System - Laboratory for ...
The result shows the DFT prot will greatly increase if DFT is used, since it saves thedevelopment time and shortens time to market. Besides, by comparing dierent volumes forthe same case, we found a threshold volume. The total cost with DFT is lower than thatwithout DFT under this threshold volume.6
Chapter 2Economic ModelsIn this chapter, we propose our economic models to estimate prot and quality of a testingstrategy during the oor-planning stage. In general, estimation is wildly used to predictresults in advance. Models of the interested system should be built up before estimationresults can be obtained. The way how models are created strongly aects the precision ofsimulation. Minor information is dropped to reduce the computing complexity in the processof modeling. In fact, there is a close correspondence between complexity on one hand andprecision on the other hand, so a variety of models are constructed for trade-os betweenthem. Moreover, the lack of detailed information in the early stage of estimation impedescreating precise models. In our economic models, there are some empirical parameters,including design complexity, reusability, and testability, etc. These parameters are vague atthe rst sight. But experienced designers, in practice, can always obtain reasonable gures.In addition, our system collects such parameters of various designs into a database to helpthe users perform estimation according to similar designs.Finally, the goal of our system is not to provide exact prediction of the prot, predictingrelative economic metric among various testing strategies. It will be a great help for makingclever decisions of testing strategies before the design process.This chapter is organized as follows. In the rst section, we briey dene the notationused in this paper. In the second section, the terminology of circuit description is introduced.In the third section, the concept of the whole economic model is described. The economicmodels are the Cost Model, the Time Model, the Market Life Model and the Quality Model.We discuss these four models in the following four sections, respectively. Finally, impact of7
- Page 1 and 2: An Improved VLSI Test Economics Ana
- Page 3 and 4: Contents1 Introduction 11.1 Economi
- Page 5 and 6: List of Figures2.1 Area relation be
- Page 7 and 8: Chapter 1IntroductionFrom business
- Page 9 and 10: costs are summed as the total cost.
- Page 11: TEEM)" for VLSI test strategy plann
- Page 15 and 16: 2.2 Circuit DescriptionThis section
- Page 17 and 18: Gate Area Ratio (gar): Average gate
- Page 19 and 20: (a) (b) (c)Figure 2.1: Area relatio
- Page 21 and 22: The proposed economic models consis
- Page 23 and 24: However, cost is greatly impacted b
- Page 25 and 26: Type II: C = UR f N tThis equation
- Page 27 and 28: where K dsgn is user dened design c
- Page 29 and 30: where U space is price of the build
- Page 31 and 32: Table 2.6: N pass and N v ratio.Bef
- Page 33 and 34: is aected by gate count, complexity
- Page 35 and 36: FC100%FC100%Phase IPhase IIVV(a)(b)
- Page 37 and 38: In our study, we run ATPG for ISCAS
- Page 39 and 40: asR dft = 1 2 (TMM grow +2TMM matu
- Page 41 and 42: Chapter 3System DevelopmentIn our s
- Page 43 and 44: the browser.3.2 Analysis FlowConnec
- Page 45 and 46: (a)(b)Figure 3.4: Model Editor: (a)
- Page 47 and 48: If this equation is a function, for
- Page 49 and 50: Table 4.1: ISCAS'89 benchmark circu
- Page 51 and 52: Table 4.2: Fault coverage parameter
- Page 53 and 54: Table 4.3: Fault coverage and test
- Page 55 and 56: 4.3 Case StudyIn this section, a re
- Page 57 and 58: Table 4.8: Parameters of time model
- Page 59 and 60: Table 4.12: Cost of dierent volume.
- Page 61 and 62: in Figure 4.4 for 2K volume and Fig
The result shows the DFT prot will greatly increase if DFT is used, since it saves thedevelopment time and shortens time to market. Besides, by comparing dierent volumes <strong>for</strong>the same case, we found a threshold volume. The total cost with DFT is lower than thatwithout DFT under this threshold volume.6
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