技能档案

Arduino Uno R4 Minima — Arduino Development Guide

Name: Arduino Uno R4 Minima — Arduino Development Guide
Author: therebelrobot

Provides comprehensive pinout reference, board specifications, and Arduino C++ development guide for the Arduino Uno R4 Minima (Renesas RA4M1) microcontroller. Use when writing Arduino firmware for the Arduino Uno R4 Minima, wiring peripherals, or configuring pins. Keywords: Arduino, Uno, R4, Minima, RA4M1, Renesas, Cortex-M4, C++, pinout, GPIO, I2C, SPI, UART, DAC, CAN, analog, digital, PWM, 5V, 32-bit, USB-C, 14-bit ADC, arduino-cli.

therebelrobot0 星标2026年4月15日

职业
分类: 框架内部

技能内容

Provides comprehensive reference for developing Arduino C++ firmware for the Arduino Uno R4 Minima (Renesas RA4M1).

When to Use

Writing Arduino C++ firmware targeting the Arduino Uno R4 Minima
Looking up Arduino Uno R4 Minima pin assignments, alternate functions, or peripheral mappings
Wiring sensors/actuators to the Arduino Uno R4 Minima and need GPIO reference
Configuring I2C, SPI, UART, DAC, or CAN on the Arduino Uno R4 Minima in Arduino

When NOT to Use

For TinyGo development on the Uno R4 Minima → use the Arduino-UnoR4Minima-TinyGo skill
For Arduino Uno R4 WiFi → use the Arduino-UnoR4WiFi-Arduino skill
For Arduino Uno R3 → use the Arduino-UnoR3-Arduino skill
For Arduino Nano → use the Arduino-Nano-Arduino skill

Board Overview

Parameter	Value

相关技能

Arduino Uno R4 Minima — Arduino Development Guide | Skills Pool

                              [USB-C]         [Barrel Jack]
                    ┌──────────────────────────────┐
                    │  RESET  IOREF  5V  GND  VIN  │ ← Power Header
                    │  3.3V   AREF   GND            │
                    ├──────────────────────────────┤
          SCL/A5 ──┤ A5                        D13 ├── SCK / Built-in LED
          SDA/A4 ──┤ A4                        D12 ├── CIPO (MISO)
              A3 ──┤ A3                       ~D11 ├── COPI (MOSI) / PWM
              A2 ──┤ A2                       ~D10 ├── CS (SS) / PWM
              A1 ──┤ A1                        ~D9 ├── PWM
          DAC/A0 ──┤ A0                         D8 ├──
                    │                               │
                    │        [Renesas RA4M1]        │
                    │                               │
                    │                          D7 ├──
                    │                         ~D6 ├── PWM
                    │                         ~D5 ├── PWM
                    │                          D4 ├──
                    │                         ~D3 ├── PWM / INT1
                    │                          D2 ├── INT0
           TX ─────┤ D1                        D1 ├── TX
           RX ─────┤ D0                        D0 ├── RX
                    ├──────────────────────────────┤
                    │          [ICSP]               │
                    └──────────────────────────────┘

  ~ = PWM capable    INT = External interrupt
  CAN TX/RX available on dedicated header (requires transceiver)

Pin	Digital	Analog	PWM	Interrupt	SPI	I2C	UART	Other
D0	✓	—	—	—	—	—	RX	—
D1	✓	—	—	—	—	—	TX	—
D2	✓	—	—	INT0	—	—	—	—
D3	✓	—	✓	INT1	—	—	—	—
D4	✓	—	—	—	—	—	—	—
D5	✓	—	✓	—	—	—	—	—
D6	✓	—	✓	—	—	—	—	—
D7	✓	—	—	—	—	—	—	—
D8	✓	—	—	—	—	—	—	—
D9	✓	—	✓	—	—	—	—	—
D10	✓	—	✓	—	CS	—	—	—
D11	✓	—	✓	—	COPI	—	—	—
D12	✓	—	—	—	CIPO	—	—	—
D13	✓	—	—	—	SCK	—	—	Built-in LED
A0	✓	ADC0	—	—	—	—	—	DAC
A1	✓	ADC1	—	—	—	—	—	—
A2	✓	ADC2	—	—	—	—	—	—
A3	✓	ADC3	—	—	—	—	—	—
A4	✓	ADC4	—	—	—	SDA	—	—
A5	✓	ADC5	—	—	—	SCL	—	—

MCU	Renesas RA4M1 (R7FA4M1AB3CFM)
Architecture	32-bit Arm Cortex-M4
Clock Speed	48 MHz
Flash	256 kB
SRAM	32 kB
EEPROM	8 kB (data flash)
USB	USB-C (native USB)
Operating Voltage	5V
Input Voltage (VIN)	6–24V
DC Current per I/O Pin	8 mA
Dimensions	68.85 × 53.34 mm
Digital I/O	14 (D0–D13)
PWM Outputs	6 (D3, D5, D6, D9, D10, D11)
Analog Inputs	6 (A0–A5, up to 14-bit ADC)
DAC Output	1 (A0)
CAN Bus	1 (requires external transceiver)
Built-in LED	D13

Arduino Uno R4 Minima — Arduino Development Guide

When to Use

When NOT to Use

Board Overview

Arduino Uno R4 Minima — Arduino Development Guide

When to Use

When NOT to Use

Board Overview

Pinout Diagram

Pin Reference Table

Power Pins

Arduino Setup

Board Manager

Board FQBN

Pytorch Patterns

Regex Vs Llm Structured Text

Effect

Flags

WPF to WinUI 3 Migration Skill

At Dispatch V2

Pin	Function
VIN	Input voltage (6–24V)
5V	Regulated 5V output
3.3V	Regulated 3.3V output
GND	Ground
AREF	Analog reference voltage
IOREF	I/O reference voltage
RESET	Reset (active LOW)