Looks like it's a software implementation [1]. [1] https://github.com/adafruit/Adafruit-Trinket-Gemma-Bootloader https://github.com/adafruit/Adafruit-Trinket-G

Looks like it's a software implementation [1]. [1] https://github.com/adafruit/Adafruit-Trinket-Gemma-Bootloader https://github.com/adafruit/Adafruit-Trinket-Gemma-Bootloade...