v04 → v05 Change Log
Schematic Changes & Additions
- 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
- 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.
- Added separate RF regulator w/ enable
- Originally U21. Added U7 as a substitute due to global chip shortage.
- Payload connector pinout overhaul
- See 🎛Payloads & Interfacing with External Boards for details.
- Added multiple serial bus isolation circuits
- Doesn't impact end user
- See 📈Novel Serial Bus Protection for more details.
- Added an RBF jumper for ground
- See 🔓Inhibits & RBF Header for details