This document provides instructions for setting up and programming an Attiny202 microcontroller. It describes downloading the required software, connecting an Arduino Duemilanove to program the Attiny202 via UPDI, burning the bootloader to enable programming, and writing an example blinking LED program. The steps include installing the MegaTinyCore board package, wiring the Arduino to program the Attiny202, burning the bootloader, and then uploading a test blinking LED program.

1. How to set Attiny202
Tanno Yoshinobu

2. Attiny202 is Small Microcontroller
Reference
https://akizukidenshi.com/catalog/g/g115731/

3. Environment for set Attiny202
Software
Windows 11 Pro
Arduino IDE 2.3.2
Hardware
DIP8 Programmer Adapter Socket Converter Module 150mil
Arduino Duemilanove
Some Wires and 4.7kΩresistance and Breadboard
LED

4. Procedure
1. Make Writer
2. Install MegaAttinyCore in Arduino BOARDS MANAGER
3. Connect Arduino Duemilanove and Attiny202
4. Burn bootloader
5. Embed Program

5. Make Writer
• Download and Unzip
https://github.com/SpenceKonde/jtag2updi
• Rename Folder Name “jtag2updi”
• Open the jtag2updi.ino with Arduino IDE
• Click Upload Button in Arudino IDE

6. Install megaTinyCore in Arduino BOARDS
MANAGER
• Arudino IDE Tab -> File -> Preferences -> Additional Boards
Manager URLs ->
http://drazzy.com/package_drazzy.com_index.json
• Arduino IDE Tab -> Tools -> Board -> Boards Manager ->
install megaTinyCore

7. Connect Arduino Duemilanove and
Attiny202
• Set Attiny202 in DIP8 Programmer Adapter Socket
• 5v in Arduino Duemilanove <-> VCC in Attiny202
• GND in Arduino Duemilanove <-> GND in Attiny202
• Digital Pin 6 in Arduino Duemilanove <-4.7kΩ-> UPDI in
Attiny202

8. Burn bootloader
• Arduino Tab -> Tools -> Board -> megaTinyCore ->
Attiny412/402/212/202
• Arduino Tab -> Tools -> Chip -> Attiny212
• (option) Arduino Tab - > Tools -> Internal Clock and so on
• Arudino Tab -> Tools -> Programmer ->
jtag2updi(megaTinyCore)
• Arudino Tab -> Tools -> Burn Bootloader

9. Embed Program
• Arduino Tab -> Sketch -> Uploading Using Programmer
• Wire Led between pin 4 and GND ( and resistance )
• Sample Code
void setup()
{ pinMode(4, OUTPUT); }
void loop()
{
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(4, LOW);
delay(1000);
}