i I finished a board full of references to imx53qsb reference schematic. I used the MC34708 PMIC as the demo does that.
in this design I use MC34708 to power the iMX535.The system should be automaticaly startup when the power comes up,but i fail.
in the design ,pums[5:1]=00111;ictest=gnd；
and i have tested these parameters:
so ,i have some questions :
1)vsrtc is 1.2v instead of 1.3v?
2)vpll，sw2,sw1,and so on , approach to 0v?
3)but i tested qsb (tp12),i find PMIC_ON_REQ=1.3v and PMIC_STBY_REQ(tp5)=0.and i want to know the difference between the qsb(the qsb system has no sd card to boot yet) and my design .and this difference hanppened beacuse vsrtc is different ?
Is there anybody who has experiance with auto startup the MC34708 ?