Is there any Demo porject about MPC5748G/MPC5746C power mode switch，which based on e200z2 Core，not only just switch power mode on e200z4 core ? Or is there any document that introduce how to design low power mode based on e200z2，suspend or wakeup e200z4 Core throught e200z2 core?
there is no application note for this device on low power modes. There information about low power modes and low power unit are in reference manual.
However there is example code:
Which could be a good start for you.