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Effect cause diagnosis in Java Writer Code 3/9 in Java Effect cause diagnosis

10.5 Effect cause diagnosis use java bar code 39 generator torender code 39 extended on java GS1 DataBar Overview input has logic ANSI/AIM Code 39 for Java 1 for all the vectors. Clearly, fault-free bl takes logic 0 in the former case; in the latter case it takes logic 1 for all the vectors. In other words, i (bl ) = 0 when i (b jq ) = 0 for all inputs b jq .

The case when output bl has an SAF is similar to the case of the fanout branch. 4 If bl is the output of an inverting primitive gate (i.e.

, an inverter, a NAND gate, or a NOR gate), with inputs b j1 , b j2 , . . .

, b j , then i (bl ) = u if i (b jq ) = u for each input b jq of the gate. The proof for this case is similar to that for the above case. Computation of forced values: The above conditions can be used to compute the forced value of each line for each vector by using a variant of a forward implication procedure that we will call Compute- ( ).

The main difference between a forward implication procedure and Compute- ( ) lies in the rules used to compute the values of i at outputs of a circuit element, given their values at the element s inputs. The rules used by Compute- ( ) are as follows. For a fanout system with stem b j and branches bl1 , bl2 , .

. . , bl , i (blq ) = i (b j ) for each branch blq .

For a non-inverting primitive gate with inputs b j1 , b j2 , . . .

, b j and output bl ,. i (bl ). u, if i (b jq ) = u for each input b jq of the gate, and unde ned, otherwise. The rule for in verting primitive gates is similar. For a vector Pi = ( p1,i , p2,i , . .

. , pn,i ), Compute- ( ) starts by initializing i (xl ) = pl,i , for each primary input xl , and i (b j ) = unde ned, for every other line b j in the circuit. The procedure then uses the above rules to compute values of i of each line in a manner similar to how a forward implication procedure computes logic values.

Note that the above conditions are only provided for primitive gates. How the above approach can be extended to compute forced values at the output of some types of non-primitive gates (e.g.

, complex CMOS gates) is the subject of Problem 10.22. Conditional forced values: The above rules for computing forced values can be generalized in the following manner based on the notion of conditional forced values.

Consider a fanout system with stem b j and branches bl1 , bl2 , . . .

, bl . If a fully speci ed value vi (b j ) has been deduced at b j , then for each branch blq , i (blq ) = vi (b j ), otherwise i (blq ) = i (b j ). For a non-inverting primitive gate with inputs b j1 , b j2 , .

. . , b j and output bl ,.

i (bl ) =. u, if for each input b jq of the gate, either vi (b jq ) = u or unde ned, otherwise. i (b jq ). = u, and The rules for i 39 barcode for Java nverting primitive gates can be modi ed in a similar manner. As the subsequent deduction process deduces values at circuit lines, Procedure Compute- ( ) can be invoked to update the forced values at those lines..

Fault diagnosis Table 10.15. Forced values for the circuit in Figure 10.

4 for the vectors shown in the rst three columns of Table 10.14 (Abramovici and Breuer, 1980) ( c 1980 IEEE) Forced value for line c2 c3 c4 c5 c6 0 1 1 1 0 1 1 1 0.
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