Programming the new ATtiny from Arduino using UPDI [Beginner Tutorial] - YouTube
FTDI / UPDI connector
FTDI / UPDI connector
Mini UPDI Programmer Stick | Hackaday.io
UPDI interface with Attiny3217 isn't working | AVR Freaks
Arduino UNO as UPDI programmer for ATmega4809 | Details | Hackaday.io
AVR® Programming Interfaces - Developer Help
Can't even communicate with ATtiny402 via MPLAB Snap? : avr
Programming AVR128DA28 with UPDI from R-Pi | AVR Freaks
Create a 12V version of microUPDI · Issue #3 · MCUdude/microUPDI · GitHub
USB UPDI Programmer PCB for AVR Micrcontrollers - Electronics-Lab.com
UPDI pin noise robustness in ATtiny | AVR Freaks
STK500 to UPDI is working! (was: Enabling XTiny UPDI) | AVR Freaks
Space-saving FTDI / UPDI connector for the ATtiny3217 and others - Product Design - Arduino Forum
AVR® DA Family
Atmel-ICE
Create Your Own UPDI Programmer - Arduino Project Hub
Pullups on UPDI, RST... | AVR Freaks
Getting started with the new ATtiny chips - Programming the Microchip's 0-series and 1-series ATtiny with the Arduino IDE - Electronics-Lab.com
BASCOM-AVR
A simple and inexpensive way to program new AVR ATtiny214, ATtiny414, ATtiny814 and Atmega microcontrollers using by the UPDI interface - ООО "НПК "Спецтехнаука"
GitHub - MCUdude/microUPDI: DIY UPDI programmer with open source hardware!