FrSky R9 MM-FC supports 3-6s Lipo direct input, built-in hall Current Sensor

The FrSky 900MHz R9 MM-FC (OMNIBUS F4 Fireworks V2) uses the ICM20608 over SPI to produce stable flight performance. Integrated with the R9 MM receiver mounted on-board protection box, and the ICM20608 runs perfectly under 32k Gyro loop. Also onboard are a barometer and AB7456 OSD chip for the Betaflight integrated OSD.

The FrSky R9 MM-FC (OMNIBUS F4 Fireworks V2) supports 3-6s Lipo direct input, built-in hall Current Sensor and Power Filter as well. The on Board PDB is tweaked by using 12-Layer PCB design. There is only 0.2-0.5 mohm internal resistance from input to each output pad.

FrSky 900MHz R9 MM-FC Features

 Tantalum Capacitors can be added to the board (not included)
 Solder pads added for VTX and Camera Control (next to Video pads)
 The orientation of IMU FPC optimized
 Gyro ribbon cable redesigned to fit without extending outside the board
 Added an 8v BEC and LC Filter for the camera and VTX power
 This board now has 5 UART ports

FrSky 900MHz R9 MM-FC Specification

 STM32 F405 MCU, Runs Betaflight firmware (supported from v3.2)
 FrSky R9 MM receiver in protection box
 ICM20608 over SPI Bus in dampening box (optional MPU6000)
 30.5×30.5 mm mounting holes
 Supports Lipo direct plug-in (3-6S)
 Built-in sensor damper
 Supports 5V 1A BEC output (Buck)
 Supports 8V 1A BEC with LC filter output for the camera and VTX (Buck)
 STM32 controls OSD chip over SPI in DMA mode (Betaflight OSD)
 Built-in hall Current Sensor
 Built-in Professional Level PDB
 More caps to reduce power noise

Note: Please upgrade the compatible R9M / R9M Lite module with the latest firmware simultaneously, and rebind the devices after the update.

Article source: https://article-realm.com/article/Health-Fitness/6719-FrSky-R9-MM-FC-supports-3-6s-Lipo-direct-input-built-in-hall-Current-Sensor.html