The UPDI Friend USB to UPDI Programmer is a compact and reliable programming tool designed for modern Microchip ATtiny microcontrollers that use the UPDI (Unified Program and Debug Interface). It provides an easy and stable way to program and debug ATtiny chips directly from a computer using a standard USB connection.
This programmer integrates power selection, signal conditioning, and status indication into a single small board, eliminating the need for external resistors or complex wiring. It is suitable for both breadboard prototyping and permanent development setups.
Key Features
Supports UPDI programming for modern ATtiny microcontrollers
Selectable 3.3V or 5V power and logic levels
Onboard USB to serial converter for stable communication
Integrated 1K resistor between RX and TX for UPDI operation
USB Type-C interface for power and data
Power status and serial activity indicator LEDs
Compact design with breakout pads for custom wiring
Technical Specifications
| Parameter | Specification |
|---|
| Programming Interface | UPDI |
| Supported MCUs | ATtiny816, ATtiny817, ATtiny1616 and other UPDI-based ATtiny chips |
| USB Interface | USB Type-C |
| USB to Serial Chip | CH340E |
| Logic Voltage | 3.3V or 5V selectable |
| Max 3.3V Output Current | Up to 500mA |
| Built-in Resistor | 1K RX-TX loopback |
| Status Indicators | Power LED, Serial activity LED |
| Connector | JST-SH 3-pin cable and 0.1 inch breakout holes |
How to Use
Connect the programmer to your computer using a USB Type-C cable
Select the desired power level (3.3V or 5V)
Connect the UPDI pin, VCC, and GND to the target ATtiny microcontroller
Use Arduino IDE with megaTinyCore installed
Select Serial UPDI as the programmer and upload firmware
Applications
Programming ATtiny microcontrollers with UPDI
Breadboard prototyping
Embedded development and testing
Educational and hobby electronics projects
Package Includes
Why Choose This Programmer
This UPDI programmer simplifies ATtiny development by combining power selection, signal conditioning, and USB communication into one compact board. It removes the need for manual resistor wiring and provides stable, repeatable programming for both beginners and advanced developers.
Upgrade your ATtiny development workflow with a reliable USB to UPDI programmer and get started faster on your next embedded project.
