Arduino Uno R3 (ATmega328P)

Key data

Category

Arduino

Simulation model

Microcontroller with real firmware

Manufacturer part number

Arduino Uno Rev3 (A000066)

Reference prefix

A

Pins

23

Land pattern

Arduino_UNO_R3

Notes

The firmware runs on an emulated CPU core, instruction by instruction. Peripherals that the model implements (GPIO, timers, UART, SPI, I²C, ADC and others, see the description) act on the pins of the circuit, so the analog parts around the chip see the same voltages and timing as on a real board.

• Supply the board through the 5V pin (or a USB host part); GND to ground.
• Right-click the part and choose "Open in code editor" to write and compile its code; "Serial monitor" shows its UART output.
• In the inspector you can load a demo firmware or your own ELF / Intel HEX / BIN file instead.
• GPIO pins are real circuit pins: an LED on an output needs a series resistor, an input needs a defined level (pull-up or pull-down).
• The debugger in the code view stops at breakpoints and shows registers, variables and the call stack.

Simulation model

An emulated CPU core runs the firmware binary instruction by instruction. The GPIO pins are pins of the analog circuit: outputs drive through a driver resistance, inputs read the voltage with thresholds.

Device

atmega328p

CPU core

AVR 8-bit

Emulator

AVR emulator

Firmware

Arduino sketch compiled in the code view (arduino-cli, arduino:avr), or your own ELF / Intel HEX / BIN file

Flash / RAM for firmware

32 KB / 2 KB

Supply pins

5V / GND

Mapped GPIO pins

21

Pins 23

simulatedreal chip onlyPin functions from the emulator and the datasheet.

PCB