TMS570LS3137
SPNS162.–SEPTEMBER 2011
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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, %
0
TEST CYCLES
0
0
1
62.13
70.09
74.49
77.28
79.28
80.90
82.02
83.10
84.08
84.87
85.59
86.11
86.67
87.16
87.61
87.98
88.38
88.69
88.98
89.28
89.50
89.76
90.01
90.21
1365
2
2730
3
4095
4
5460
5
6825
6
8190
7
9555
8
10920
12285
13650
15015
16380
17745
19110
20475
21840
23205
24570
25935
27300
28665
30030
31395
32760
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
58
System Information and Electrical Specifications
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