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www.ti.com STC2 (nHET) Test Coverage and Duration
10.7 STC2 (nHET) Test Coverage and Duration
The test coverage and number of test execution cycles (STCCLK) for each test interval are shown in
Table 10-6.
Table 10-6. STC2 Test Coverage and Duration
Intervals Test Coverage Test Time (Cycles) Intervals Test Coverage Test Time (Cycles)
0 0 0 29 94.97 39585
1 70.01 1365 30 95.03 40950
2 77.89 2730 31 95.10 42315
3 81.73 4095 32 95.16 43680
4 84.11 5460 33 95.22 45045
5 86.05 6825 34 95.27 46410
6 87.78 8190 35 95.33 47775
7 88.96 9555 36 95.42 49140
8 89.95 10920 37 95.49 50505
9 90.63 12285 38 95.54 51870
10 91.20 13650 39 95.66 53235
11 91.60 15015 40 95.69 54600
12 92.02 16380 41 95.75 55965
13 92.37 17745 42 95.79 57330
14 92.66 19110 43 95.82 58695
15 92.87 20475 44 95.85 60060
16 93.04 21840 45 95.91 61425
17 93.26 23205 46 95.95 62790
18 93.47 24570 47 95.99 64155
19 93.67 25935 48 96.01 65520
20 93.82 27300 49 96.04 66885
21 93.96 28665 50 96.07 68250
22 94.12 30030 51 96.09 69615
23 94.24 31395 52 96.12 70980
24 94.38 32760 53 96.15 72345
25 94.50 34125 54 96.19 73710
26 94.72 35490 55 96.24 75075
27 94.80 36855 56 96.29 76440
28 94.90 38220 57 96.41 77805
Table 10-7 gives the typical STC execution times for 9 intervals and 57 intervals at different clock rates.
You can choose the number of intervals to be run based on the coverage needed and allowed time for
STC execution.
Table 10-7. Typical Execution Times for STC2
@ VCLK = 110 MHz @ VCLK = 150 MHz
Number of Intervals Coverage STCCLK = 110 MHz STCCLK = 75 MHz
9 >90% 111.68 uS 163.8 us
57 >96% 707.3 uS 1.038 mS
427
SPNU562–May 2014 Self-Test Controller (STC) Module
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