Use the nPM2100 EK with the nRF5340 DK

The nPM2100 EK can power the nRF5340 System on Chip (SoC) as a host device on the nRF5340 Development Kit (DK).

1. Connect the nPM2100 EK to the nRF5340 DK as shown in Connecting nPM2100 EK and nRF5340 DK.
2. On the DK, make sure the VEXT→nRF switch SW10 is in the ON position.
   This connects the external supply to VDD. In this case, this connects the external supply toVOUT on the Power Management Integrated Circuit (PMIC).
3. On the DK, make sure the nRF POWER SOURCE switch SW9 is in the VDD position.
   This ensures that only the nRF5340 circuitry is powered from VDD.
4. To program and debug nRF5340 SoC, connect a USB cable to the USB port J2 on the DK.
   This only powers the IMCU used for flashing and debugging.
5. On the EK, disconnect the USB-C cable from J4 to put the EK in standalone mode.
   This disables the nPM Controller.
6. Insert a battery in the battery add-on board, ensuring correct polarity.
7. To power the EK, plug the battery add-on board in the EK socket at P4.
8. Slide switch SW5 to VBAT.

Figure 1. Connecting nPM2100 EK and nRF5340 DK

Note: The nRF5340 host device and the nPM2100 PMIC have the same I/O reference level.

The following table shows the connections between the EK and the nRF5340 DK.

Table 1. Connections between nPM2100 EK and nRF5340 DK

Function	nPM2100 EK		nRF5340 DK		Comment
	Pin name	Location	Pin name	Location
Power	VOUT	P11, pin 3	External supply + (positive)	P21, pin 1	3.0 V, change jumper on VSET to 3.0 V
	GND	P11, pin 4	External supply - (negative)	P21, pin 2	Ground
TWI	SCL	P11, pin 2	P1.02	P4, pin 9	Connect to a TWI compliant GPIO on DK
	SDA	P11, pin 1	P1.03	P4, pin 10	Connect to a TWI compliant GPIO on DK
GPIO	GPIO0	P12, pin 1	P1.10	P4, pin 1	Connect to a GPIO on DK
	GPIO1	P12, pin 2	P1.11	P4, pin 2	Connect to a GPIO on DK