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CubeSat Main Bus Unit SatBus 3C2

Main Bus Unit “SatBus 3C2”

SatBus 3C2 is a highly integrated nano-satellite main bus unit containing advanced functionality:

  • An on-board flight computer (OBC)
  • An attitude determination & control system (ADCS)
  • Redundant UHF communication system (COMM)

SatBus 3C2 is tailored for small-sized spacecrafts and complies with the CubeSat standard. The system is designed to save customers’ time and budget, minimize required integration effort and effectively increase volume for payload as well as overall system reliability through matched hardware on one board.

SatBus 3C2 architecture is based on an STM32 H7 series microcontroller with high-performance and low power ARM Cortex™ M7 32-bit core MCU, operating at a frequency of up to 400 MHz. The same M7-core MCU performs OBC and ADCS functions. External flash and F-RAM memories provide reliable storage for telemetry and user data. A number of various digital interfaces are available for sensor and other CubeSat hardware support.

 

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Main Bus Unit “SatBus 3C2”

SatBus 3C2 is a highly integrated nano-satellite main bus unit containing advanced functionality:

  • An on-board flight computer (OBC)
  • An attitude determination & control system (ADCS)
  • Redundant UHF communication system (COMM)

SatBus 3C2 is tailored for small-sized spacecrafts and complies with the CubeSat standard. The system is designed to save customers’ time and budget, minimize required integration effort and effectively increase volume for payload as well as overall system reliability through matched hardware on one board.

SatBus 3C2 architecture is based on an STM32 H7 series microcontroller with high-performance and low power ARM Cortex™ M7 32-bit core MCU, operating at a frequency of up to 400 MHz. The same M7-core MCU performs OBC and ADCS functions. External flash and F-RAM memories provide reliable storage for telemetry and user data. A number of various digital interfaces are available for sensor and other CubeSat hardware support.

 

  • Features:
    • 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
    • 2×512 KB of FMC-connected FRAM
    • 256 MB of external NOR-FLASH for data storage (2 x two die (64 MB each) chips, QSPI)
    • 2×512 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
  • COMM:
    • 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