Developing with Front-End Modules

Zephyr and the nRF Connect SDK provides support for developing applications with the following Front-End Module (FEM) devices:

Hardware platform	PCA number	Board targets	Documentation	Product pages
nRF21540 DK	PCA10112	nrf21540dk/nrf52840	Product Specification User Guide	nRF21540 DK product page

The following FEM Shield is available and defined in the nrf/boards/shields folder:

Hardware platform	PCA number	Board target	Documentation	Product pages
nRF21540 Evaluation Kit (EK)	PCA63550	nrf21540ek	User Guide Front-End Module Feature	nRF21540 DB product page

Also, various Skyworks front-end modules are supported. For example, SKY66112-11EK has a 2-pin PA/LNA interface.

The Front-End Module Feature is supported on the nRF52 and nRF53 Series devices.

Subpages:

• Enabling FEM support
  • MPSL FEM-only configuration
  • Enabling GPIO mode support for nRF21540
  • Enabling GPIO+SPI mode support for nRF21540
  • Optional FEM properties for nRF21540 GPIO and GPIO+SPI
  • Enabling support for front-end modules using Simple GPIO interface
  • Use case of incomplete physical connections to the FEM module
• Using FEM power models
  • Using nRF21540 GPIO+SPI built-in power model
  • Adding custom power models
• Developing with the nRF21540 EK
  • Building and programming with nRF21540 EK