VDD VDDH DCCH Power configuration

[yuhuidx]

VDD& VDDH& DCCH

Is the connection correct? What should be paid attention to when designing the power supply?

[mash273]

Hello, 

Config no.	Supply configuration		Enabled features
	VDDH	VDD	EXTSUPPLY	DCDCEN0	DCDCEN1	USB	NFC
Config. 4	Battery/Ext. regulator	N/A	Yes	Yes	Yes	Yes	No

Hello, in config 4 is listen the schematic is for use in Battery / Ext. regulator and USB is YES.

Can I use USB and Battery at the same time? Normaly i have to use a diode.

When i use USB Only with DCDCEN = 0, It still have 1,8 V on VDD_NRF.

So, do i use a Diode or can i power off the 1,8V with Software?

I think it is not good to have a charge effect on normal batterys.