CubeSat Main Bus Unit "SatBus 3C2"

CubeSat Command & Service Modules
CubeSat Main Bus Unit "SatBus 3C1"

Main Bus Unit “SatBus 3C2”

Basic Price € 9450

NanoAvionics has developed a highly integrated small satellite main bus unit with advanced functionality:

  • Flight Computer performing  functions of a task scheduler as well as attitude determination & control system
  • Dual (redundant) UHF communication system

Unit is optimized for small sized spacecrafts and complies with the CubeSat standard. It is designed to save customer’s time and budget, minimize required integration effort and effectively increase volume for payload as well as overall system reliability through harmonized hardware.

SatBus 3C2 architecture is based on a high-performance ARM 32-bit Cortex™ M7 MCU core. All subsystems are provided with standard software package that includes a FreeRTOS Kernel and necessary software libraries for peripherals.

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  • Dual (Redundant) UHF Digital Radios “SatCOM UHF” on board
  • Multiple CAN, SPI, I2C, UART/USART interfaces
  • ARM 32-bit Cortex™ M7 CPU with clock speed up to 400 MHz
  • Double-precision FPU
  • 1 MB of internal RAM
  • 2 MB of internal FLASH memory
  • 2x512 KB of FMC-connected FRAM
  • 256 MB of external NOR-FLASH for data storage (2 x two die (64 MB each) chips, QSPI)
  • 2x512 KB of FRAM (SPI) for frequently changing data storage
    Integrated RTC
  • On-board magnetometer and three gyroscopes
  • On-board magnetorquer drivers
  • PWM, GPIO Outputs
  • Debug interfaces: USB/SWD
  • FreeRTOS
  • CSP support
  • User-friendly console
  • Telemetry logging
  • Temperature range: -40 to 85 °C
  • PCB: Gold plated FR-4 (IPC-6012B)
  • IPC – A600H class 3 assembly, soldering per ESA specification ECSS-Q-70-08
  • 104 pin SAMTEC stack and PicoBlade™ 1.25 mm interfacing connectors
  • Dimensions: 95.5 x 90.2 x 18 mm


  • Clock speed up to 72 MHz (configurable)
  • 48 KB of RAM
  • 256 KB FLASH memory
  • 64 MB of external NOR-FLASH for data storage connected over SPI
  • External interfaces: UART and CAN
  • Frequency range: 430-440 MHz (Half Duplex)
  • Baud rate: 9600
  • Rx sensitivity in 9600 baud: -120 dBm
  • Maximum RF output power: +33 dBm (2 W)
  • Supported modulations: 2-FSK (including G3RUH subtype), 2-GFSK, 4-FSK, 4-GFSK, MSK, OOK
  • Compatibility with AX.25 radio packet protocol
  • Transmitter over-temperature protection
  • In-orbit re-configuration

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