The nPM1300 Evaluation Kit (EK) can power the nRF5340 System on Chip (SoC) as a host device on the nRF5340 Development Kit (DK).
Note: The EK only powers the nRF5340 SoC on the DK. To access the nRF5340 DK
features such as flashing and debugging, the IMCU on the DK must be externally powered.
To connect and configure the EK with the nRF5340 DK:
- Connect the nPM1300 EK to the nRF5340 DK according to the connection diagram.
- 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, VOUT2 on the Power Management Integrated Circuit (PMIC)).
- 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.
- To flash and debug nRF5340, connect a USB cable to the USB port J2 on the DK. This only powers the IMCU used for flashing and debugging.
- On the EK, disconnect the USB-C cable from J4 to put the EK in standalone mode. This disables the nPM Controller.
- Power the EK by connecting a desired power input source: VBUS, VBAT, or both.
Note: Both the nRF5340 host device and the PMIC have the same I/O reference
level (VOUT2), therefore VDDIO is redundant and not
connected between the EK and the DK.
The following figure and table show the connections between the EK and the nRF5340 DK. A similar setup might apply to the DKs of the nRF52-series or the nRF9160 DK (not covered in this user guide).
Figure 1. Connecting nPM1300 EK with nRF5340 DK
| Function | nPM1300 EK | nRF5340 DK | Comment | ||
|---|---|---|---|---|---|
| Pin name | Location | Pin name | Location | ||
| Power | VOUT2 | P5 pin 1 | External supply + (positive) | P21 pin 1 | 3.0 V, use default VSET2 on EK |
| GND | P5 pin 3 | External supply - (negative) | P21 pin 2 | Ground | |
| TWI | SDA | P11 pin 1 | P1.02 | P4 pin 9 | Connect to a TWI compliant General-Purpose Input/Output (GPIO) on DK |
| SCL | P11 pin 2 | 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 | |
| GPIO2 | P12 pin 3 | P1.12 | P4 pin 3 | Connect to a GPIO on DK | |
| GPIO3 | P12 pin 4 | P1.13 | P4 pin 4 | Connect to a GPIO on DK | |
| GPIO4 | P12 pin 5 | P1.14 | P4 pin 5 | Connect to a GPIO on DK | |
| Other | SHPHLD | P10 pin 3 | P1.15 | P4 pin 6 | Connect to a GPIO on DK |