FrSky 2.4GHz RXSR-FC uses the ICM20608 over SPI to produce stable flight performance

by Jessica Jackson on Jul 14, 2020 Computers and Technology 162 Views

The FrSky 2.4GHz RXSR-FC (OMNIBUS F4 Nano V7) uses the ICM20608 over SPI to produce stable flight performance. Integrated with the RXSR-FC receiver mounted onboard, and the ICM runs the 32k Gyro loop perfectly. Also onboard is an AB7456 OSD chip for the Betaflight OSD.

An on-board FrSky RXSR-FC receiver and 20mm x 20mm mounting holes make it perfect for a super clean micro quadcopter build. It supports 3-6S LiPo direct input and has 6 hardware UARTs and an I2C port.


STM32 F405 MCU, Runs Betaflight firmware (supported from v3.2)
FrSky RXSR-FC receiver
ICM Gyro over SPI Bus
20 x 20 mm mounting holes
Supports LiPo direct plugin (3-6S)
Supports 5V 3A BEC output (Step-down)
STM32 controls OSD chip over SPI in DMA mode (Betaflight OSD)
6 UART ports


Tantalum Capacitors added for noiseless gyro reading
Solder pads added for SmartAudio and Camera Control (next to Video pads)
FPC port for FrSky FC receivers like the R9MM-FC / RXSR-FC receiver
PWM pads on corners
Upgraded BEC, 3A output

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