nrfx is a standalone set of drivers for peripherals present in Nordic Semiconductor's SoCs. It originated as an extract from the nRF5 SDK. The intention was to provide drivers that can be used in various environments without the necessity to integrate other parts of the SDK into them. For the user's convenience, the drivers come with the MDK package. This package contains definitions of register structures and bitfields for all supported SoCs, as well as startup and initialization files for them.

• nRF51 Series
• nRF52805
• nRF52810
• nRF52811
• nRF52820
• nRF52832
• nRF52833
• nRF52840
• nRF5340
• nRF9160

 .
 ├── doc             # Project documentation files
 ├── drivers         # nrfx driver files
 │   ├── include     # nrfx driver headers
 │   └── src         # nrfx driver sources
 ├── hal             # Hardware Access Layer files
 ├── helpers         # nrfx driver helper files
 ├── mdk             # nRF MDK files
 ├── soc             # SoC specific files
 └── templates       # Templates of nrfx integration files

nrfx documentation is available in the doc\html folder of the release package.

Refer to this guide for more details.