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v04 → v05 Change Log

Schematic Changes & Additions


  1. Changed multiple pin connections on SAMD microcontroller

    SAMD pin 13 (PA04): AIN4 → ENAB_RF

    SAMD pin 35 (PA16): NC → PA16

    SAMD pin 37 (PA18): PA18 → VBUS_RESET

    SAMD pin 9 (PB06): RF2_IO1 → RF2_IO0

    SAMD pin 10 (PB07): RF2_BUSY → RF2_IO4

  1. Added "one shot" Vbus reset circuit

    Pulling VBUS_RESET high disables the primary regulator (3.3V) for a brief period (~1 second). This allows the user to remotely perform a "clean start" of the board and its various peripherals. VBUS_RESET must be toggled low→high again in order to perform another reset, thereby preventing boot-looping in the event of an electrical short or some other catastrophic failure.

  1. Added separate RF regulator w/ enable
    1. Originally U21. Added U7 as a substitute due to global chip shortage.
      ⚠️
      NOTE:
      • If U21 is populated: ENAB_RF must be HIGH to enable RF regulator
      • If U7 is populated: ENAB_RF must be LOW to enable RF regulator
  1. Payload connector pinout overhaul
    1. See 🎛Payloads & Interfacing with External Boards for details.
  1. Added multiple serial bus isolation circuits
    1. Doesn't impact end user
    1. See 📈Novel Serial Bus Protection for more details.
  1. Added an RBF jumper for ground
    1. See 🔓Inhibits & RBF Header for details