Power supply

nRF21540 EK Hardware

The nRF21540 EK has multiple power options.

The power options are the following:

  • VDD pins on P5 (1.7–3.6 V)
  • VDD pins on P7 (1.7–3.6 V)
Figure 1. Power supply option P5
nRF21540 EK power supply option VDD pins on P5
Figure 2. Power supply option P7
nRF21540 EK power supply option VDD pins on P7

The VDD for the nRF21540 EK must have the same voltage as the General-Purpose Input/Output (GPIO) pins used to control the nRF21540 through the pin control interface/SPI interface available on the Arduino headers.

Note: A maximum current input of 0.5 A is recommended.