91_pdfsam_VLSI TEST PRINCIPLES & ARCHITECTURES

91_pdfsam_VLSI TEST PRINCIPLES & ARCHITECTURES - 60...

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60 VLSI Test Principles and Architectures D FF 1 CK X 2 Combinational logic X 3 X 1 Y 2 Y 1 D FF 2 D FF 3 Q Q Q ± FIGURE 2.13 Sequential circuit example. X 2 Combinational logic X 3 X 1 Y 2 Y 1 PI PPI PO PPO DI Q SFF 1 SI SE DI Q SFF 2 SFF 3 SI SE SE DI Q SFF 1 .Q SFF 2 .Q SFF 3 .Q SI SE CK SI SO (a) SE CK PI SS C 0 X X 1 0 X 1 1 0 1 1 0 L H L L H L 1 L H 0 1 L 1 0 1 1 0 1 L L H V 1 :PI V 1 :PPI V 2 :PPI V 2 :PI PO observation PPO observation HH H S : shift operation /
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This note was uploaded on 05/16/2011 for the course ENGINEERIN mp108 taught by Professor Elbarki during the Spring '08 term at Alexandria University.

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