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TMS570LS3137 Datenblatt(PDF) 58 Page - Texas Instruments |
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TMS570LS3137 Datenblatt(HTML) 58 Page - Texas Instruments |
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58 / 159 page ![]() TMS570LS3137 SPNS162. – SEPTEMBER 2011 www.ti.com 4.5.6.1 Application Sequence for CPU Self-Test 1. Configure clock domain frequencies. 2. Select number of test intervals to be run. 3. Configure the timeout period for the self-test run. 4. Enable self-test. 5. Wait for CPU reset. 6. In the reset handler, read CPU self-test status to identify any failures. 7. Retrieve CPU state if required. For more information see the TMS570LS31X/21X Technical Reference Manual (SPNU499). 4.5.6.2 CPU Self-Test Clock Configuration The maximum clock rate for the self-test is 90MHz. The STCCLK is divided down from the CPU clock. This divider is configured by the STCCLKDIV register at address 0xFFFFE108. For more information see the TMS570LS31X/21X Technical Reference Manual (SPNU499). 4.5.6.3 CPU Self-Test Coverage Table 4-7 shows CPU test coverage achieved for each self-test interval. It also lists the cumulative test cycles. The test time can be calculated by multiplying the number of test cycles with the STC clock period. Table 4-7. CPU Self-Test Coverage INTERVALS TEST COVERAGE, % TEST CYCLES 0 0 0 1 62.13 1365 2 70.09 2730 3 74.49 4095 4 77.28 5460 5 79.28 6825 6 80.90 8190 7 82.02 9555 8 83.10 10920 9 84.08 12285 10 84.87 13650 11 85.59 15015 12 86.11 16380 13 86.67 17745 14 87.16 19110 15 87.61 20475 16 87.98 21840 17 88.38 23205 18 88.69 24570 19 88.98 25935 20 89.28 27300 21 89.50 28665 22 89.76 30030 23 90.01 31395 24 90.21 32760 58 System Information and Electrical Specifications Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback focus.ti.com: TMS570LS3137 |
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