Developing with Front-End Modules

Information in this section complements the general Application development guides (such as Configuring and building or Programming an application) with information specific to Front-End Module devices.

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

nRF52 SeriesnRF53 SeriesnRF54H SeriesnRF54L SeriesnRF91 Series

Front-End Module support

FEM device	Implementation	nRF52810	nRF52811	nRF52820	nRF52832	nRF52833	nRF52840
nRF21540	nRF21540 GPIO	–	–	–	–	Supported	Supported
nRF21540	nRF21540 GPIO+SPI	–	–	–	–	Supported	Supported
SKY66112-11	Simple GPIO	–	–	–	–	Supported	Supported

The FEM support on SoCs that are not listed in the table above might still work, but it is not tested and not guaranteed to work.

The following hardware platforms with Front-End Module (FEM) are supported by the nRF Connect SDK:

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

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