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U. Glaeser

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Table 45.4 shows that MILEF has a reasonable performance for large gate-level circuits. No aborted<br />

faults are left within a reasonable amount of time. The results presented in Tables 45.2–45.5 show that<br />

the number of redundancies and test patterns based on the different fault models is smallest when using<br />

overcurrent-based fault models. The CPU time and the number of test patterns required for overcurrentbased<br />

fault models is smaller (about 10% or less depending on the circuit structure) than for test pattern<br />

generation for the corresponding voltage-based fault models (exception C6288 where redundancies are<br />

© 2002 by CRC Press LLC<br />

TABLE 45.3 MILEF Performance on Pure Switch-Level Netlists (Robust Single-Input<br />

Transition Fault Model) Mode 1<br />

Circuit<br />

Faults Redundant +<br />

Aborted<br />

Robust Test<br />

Patterns<br />

Non-Robust<br />

Test Patterns<br />

Robust Fault<br />

Coverage (%)<br />

CPU<br />

Time/s<br />

lay432 46 + 0 511 63 89.5 41<br />

lay499<br />

8 + 0<br />

1148 219 85.8 503<br />

lay880 0 + 4 491 43 97.2 30<br />

lay1355 5 + 1 1528 295 85.4 586<br />

lay1908 8 + 6 1056 93 95.6 146<br />

lay2670 65 + 22 1319 64 95.1 234<br />

lay3540 121 + 3 1858 166 92.6 487<br />

lay5315 33 + 2 3036 205 96.3 317<br />

lay6288 2 + 1 1282 63 91.1 4017<br />

lay7552 46 + 45 3079 258 95.7 1742<br />

TABLE 45.4<br />

Circuit<br />

Performance of MILEF (Stuck-at Fault Model) Mode 2<br />

Faults Redundant +<br />

Aborted<br />

Test<br />

Patterns<br />

Fault<br />

Coverage (%) CPU Time/s<br />

C432 4 + 0 77 99.2 9<br />

C499 8 + 0 90 98.9 34<br />

C880 0 + 0 120 100 2<br />

C1355 8 + 0 107 99.5 61<br />

C1908 9 + 0 142 99.5 42<br />

C2670 117 + 0 266 95.7 76<br />

C3540 137 + 0 222 96.0 58<br />

C5315 59 + 0 286 98.9 30<br />

C6288 34 + 0 41 99.6 133<br />

C7552 131 + 0 350 98.3 179<br />

TABLE 45.5 Performance of MILEF (Stuck-at Patterns with Simplification<br />

for Overcurrent Tests) Mode 3<br />

Circuit<br />

Faults Redundant +<br />

Aborted Test Patterns<br />

Fault<br />

Coverage (%) CPU Time/s<br />

C432 0 + 0 14 100

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