R7FA4-Plus-A User Guide

Overview

Introduction

The R7FA4 Plus development platform provides users with an economical, flexible and convenient way to realize more creative ideas. On the hardware, it features Renesas Electronics' powerful 32-bit microcontroller R7FA4M1AB3CFM, which has expanded memory, peripherals, and faster clocks, enabling it to easily handle complex projects.

Features

Based on R7FA4M1AB3CFM, and is compatible with Arduino UNO R4 Minima.
Utilizes Renesas Electronics' RA4M1 (Arm® Cortex®-M4) microcontroller, with a main frequency of 48MHz.
Equipped with 256 kB Flash and 32 kB RAM, the expanded memory can easily handle complex projects.
The R7FA4 Plus development board adds a 12-bit DAC, CAN bus and operational amplifiers, providing expanded functionality and flexibility for designs.
Onboard 5V/3.3V headers for easy voltage switching, allowing the use of more expansion modules.
Flexible power options, supporting USB-C power supply or external input power VIN (6V<=VIN<=24V).
Onboard power indicator (PWR), USER LED, serial port receive indicator (RX) and transmit indicator (TX), making it easy to monitor the working status of the development board.
Onboard ICSP interface, can be used as an SPI interface.
Supports user soldering of corresponding interface insertion into the experimental board.

Product Parameters Comparison

MODEL
MICROCONTROLLER	R7FA4 (32-bit ARM Cortex-M4)	R7FA4 (32-bit ARM Cortex-M4)	ESP32-S3R8 (Dual-core 32-bit Xtensa LX7)
MICROCONTROLLER	R7FA4 (32-bit ARM Cortex-M4)	ESP32-S3FN8 (Dual-core 32-bit Xtensa LX7)	ESP32-S3R8 (Dual-core 32-bit Xtensa LX7)
CLOCK FREQUENCY	R7FA4: 48MHz	R7FA4: 48MHz	ESP32-S3R8: 240MHz
CLOCK FREQUENCY	R7FA4: 48MHz	ESP32-S3FN8: 240MHz	ESP32-S3R8: 240MHz
STORAGE	R7FA4: 256kB Flash, 32kB RAM	R7FA4: 256kB FLASH, 32kB RAM	ESP32-S3R8: 384kB ROM, 512kB RAM, 16MB Flash, 8MB PSRAM
STORAGE	R7FA4: 256kB Flash, 32kB RAM	ESP32-S3FN8: 384kB ROM, 512kB RAM, 8MB Flash	ESP32-S3R8: 384kB ROM, 512kB RAM, 16MB Flash, 8MB PSRAM
WIRELESS COMMUNICATION	None	2.4GHz WiFi + Bluetooth LE
OPERATING VOLTAGE	Options for 5V/3.3V, support more shields		3.3V
POWER INPUT	6~24V		6~21V
RESET BUTTON	Lateral, easier to use when connecting with shield		Vertical
IO PIN OUTPUT CURRENT	8mA		40mA
DIGITAL PINS	14		14
ANALOG PINS	6		8
DAC	2		None
PWM	6		5
UART	1		2
I2C	1		1
SPI	1		1
CAN	1		None
DC JACK	Low profile, shields won't be blocked anymore while connecting		None
POWER OUTPUT HEADER	Provides 5V OR 3.3V power output and common-grounding with other boards		None
5V POWER OUTPUT	Up to 2000mA Max, features higher driving capability		1000mA Max
EXPERIMENTAL BOARD	Support, the solder pad is provided for DIY interfaces to connect with the experimental board		Support

Hardware Description

Onboard Interface

Pinout Definition

Dimensions

Arduino IDE Development

Install Arduino IDE

The following development is based on Windows by default.

Open download page, and select the corresponding one to download according to your system and system bits.
Select "JUST DOWNLOAD" OR "CONTRIBUTE DOWNLOAD".
Just run to install and install all the defaults.

Install Board Package

Please open "Board Manager" on the left, search "UNO R4 Minima" and install the latest version (or the version to be used):

Create Example

The following example is about how to make LED blinks (File -> examples -> Blink under 01.Basics).

Select the development board and COM port.

Search UNO R4, select Arduino UNO R4 Minima, and then click on "OK".

Click ✓ in the menu bar to compile, and click → to burn the compiled program to the board.

Open Example

Open the existing example, the operation is simpler, directly run the corresponding .ino demo, refer to the operation above, select the corresponding board and port, compile, download and burn.

Example Explanation

GPIO_TEST

This demo is for testing the GPIO0-13 output, in this demo, the GPIO0-13 is initialized as output mode and outputs the high level or low level in order.

ADC_TEST

The Photosensitive demo obtains the value of the photosensitive resistor by reading the value of the pins A0-A5. If the value is greater than or equal to 730, the LED pin will be turned on and the relay pin will be switched on. Otherwise, the LED pin will be turned off and the relay pin will be switched off.

The Read_Analog_Input demo obtains the value of the analog pin of the raindrop sensor by reading the value of the pin A0. If the value is less than 500, the LED is on; otherwise, the LED is off.