Hello,
I planned to to use in my design 1.8V. But for redusing power consumption of nrf5340, which way is correct and prefferable:
1. Use external 1.8V supply in normal mode, when VDD connected to VDDH;
2. connect external voltage to VDDH(3V) and use internal VDDOUT 1.8V(High voltage mode).
one more question...
For program nrf53 should i use voltage level shifter, if my supply is 1.8V
Beforehand thanks,
Arsen