Connection of nRF21540 via SPI interface only

[backstreet.devisor]

Hello everyone!

Please tell me if I can connect nRF21540 to a microcontroller using only 4 SPI pins (SCK, MOSI, MISO, CSN) and control it completely? At the same time I want to leave MODE, RX_EN, ANT_SEL, TX_EN, PDN pins unconnected. 

Thank you.

[Bendik Heiskel]

Hi,

The nRF21540 can almost be fully controlled with only the SPI interface. The PDN pin is needed to control the power down, this can't be controlled using the SPI interface. MODE, RX_EN, TX_EN and ANT_SEL must all be connected to ground when not used.

Our SDKs does not have support for controlling the nRF21540 using SPI only, so you would have to implement this feature yourself.

 

Best regards,

Bendik