SPNS254A June 2022 – March 2024 TMS570LC4357-SEP
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The self-test, if enabled, is automatically applied to the entire processor group. Self-test will only start when nCLKSTOPPEDm is asserted which indicates the CPU cores and the ACP interface are in quiescent state. While the processor group is in self-test, other masters can still function normally including accesses to the system memory such as the L2 SRAM. Because uSCU is part of the processor group under self-test, the cache coherency checking will be bypassed.
When the self-test is completed, reset is asserted to all logic subjected to self-test. After self-test is complete, software must invalidate the cache accordingly.
The default value of the CPU LBIST clock prescaler is’ divide-by-1’. A prescalar in the STC module can be used to configure the CPU LBIST frequency with respect to the CPU GCLK frequency.
Table 7-9 lists the 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.
INTERVALS | TEST COVERAGE, % | TEST CYCLES |
---|---|---|
0 | 0 | 0 |
1 | 56.85 | 1629 |
2 | 64.19 | 3258 |
3 | 68.76 | 4887 |
4 | 71.99 | 6516 |
5 | 75 | 8145 |
6 | 76.61 | 9774 |
7 | 78.08 | 11403 |
8 | 79.2 | 13032 |
9 | 80.18 | 14661 |
10 | 81.03 | 16290 |
11 | 81.9 | 17919 |
12 | 82.58 | 19548 |
13 | 83.24 | 21177 |
14 | 83.73 | 22806 |
15 | 84.15 | 24435 |
16 | 84.52 | 26064 |
17 | 84.9 | 27693 |
18 | 85.26 | 29322 |
19 | 85.68 | 30951 |
20 | 86.05 | 32580 |
21 | 86.4 | 34209 |
22 | 86.68 | 35838 |
23 | 86.94 | 37467 |
24 | 87.21 | 39096 |
25 | 87.48 | 40725 |
26 | 87.74 | 42354 |
27 | 87.98 | 43983 |
28 | 88.18 | 45612 |
29 | 88.38 | 47241 |
30 | 88.56 | 48870 |
31 | 88.75 | 50499 |
32 | 88.93 | 52128 |
33 | 89.1 | 53757 |
34 | 89.23 | 55386 |
35 | 89.41 | 57015 |
36 | 89.55 | 58644 |
37 | 89.7 | 60273 |
38 | 89.83 | 61902 |
39 | 89.96 | 63531 |
40 | 90.1 | 65160 |