Hi wuxianlong,
PDB used as default for S32K14X, so, you can find the example with trigger source is SW that was attached in the package with the link path: SW32K1_RTD_4.4_1.0.1\eclipse\plugins\Adc_TS_T40D2M10I1R0\examples.
For trigger source is HW, you can use one of them through this parameter:

I attached the example for this. Please refer it.
Best regards,
Nhi