warning

🚧 This document is still being actively worked on and is subject to change. 🚧

Responsible	Gianluca Ielpo Jakob Tribus
Last Updated	10/12/2025, 12:48:54 PM
Last Author	Kai Berszin

Scope

This document specifies the Sensor and Power Control Board (SPCB) previously known as "OBC Sensor PCB" .
This second board is used to connect sensors and other peripherals to the OBC main PCB (OBC).

Requirements

• The OBCS shall host the Trikarenos payload
  • UART routing to OBCM
  • Interface the MRAM to SPI-A
  • Power control
• The OBCS shall host two u-blox ZED-F9P modules
  • Landing pads for castellated mounting
  • RF frontend to antennas
  • UART and PPS routing
  • Power control
• The OBCS shall interface to thermistors
  • 8 channels
  • Model TE 11028990-00, 10k
  • Output to SPI-B interface
• The OBCS shall provide an RTC on SPI-B
• The OBCS shall be able to toggle power to each peripheral, controlled by the corresponding EN pin
• The OBCS shall host 3 magnetometers and 3 IMUs (LIS3MDL, ISM330DLC, or similar)
• The OBCS shall convert the CAN INT from ADCS to SPI (MCP2515 or similar)

Interfaces

• UART A: GNSS1
• UART B: GNSS2
• UART D: Trikarenos
• I2C B: Temp Sensors
• SPI A: Trikarenos, Arducam
• SPI B: IMU, MAG, ADC, RTC
• SPI C: CAN INT to SPI