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PILO has an accuracy of ±2 percent, which can be calibrated to ±250 ppm with a high-accuracy clock source. Since you want an accuracy of only 10%, I would recommend you to use PILO directly without trimming. Please let me know if you are facing any issues when using PILO.
At present we do not have a code example for doing trimming. But you can refer to the PILO section of Cypress PDL for more details on the usage of the trim function for PILO.
The disadvantage of using PILO over ILO apart from the current consumption being higher is that PILO is not available in hibernate mode.
If you are using RTC Timers/ counters in your project then using PILO as source for CLK_LF may lead to corruption of the RTC Timers and Counters.