Hi,
You have to disable all power domains except PD0 (which is always active)
You have to run from IRC clock (SIRC or FIRC)
In this mode, the power supply is turned off for most of the chip. The only parts of the chip that are still powered during this mode are pads mapped on wakeup lines and power domain #0 which contains the MC_RGM, MC_PCU, WKPU etc.. The IRC can be optionally switched off. This is the lowest power consumption mode possible on the chip.
For the start you can refer to reference example code:
https://community.nxp.com/docs/DOC-343775
regards,
Peter
