R7FA4 PLUS A Development Board (UNO R4 Minima Compatible)

The R7FA4 Plus A development board is based on the same R7FA4M1 32-bit microprocessor the Arduino UNO R4 Minima and uses a similar board style and layout.

The RA4M1 provides increased processing power, expanded memory, and additional peripherals. It is based on the Arm® Cortex®-M4 processor, with a main operating frequency of 48MHz. The board also features 256 kB of Flash and 32 kB of RAM.

The board features 5V/3.3V headers that make voltage adjustments easier, accommodating a wider selection of expansion modules. It offers flexible power options, including a USB-C port and an external power input supporting 6V to 24V, providing versatility in power management. For ease of monitoring and troubleshooting, the board includes a power indicator LED, a user LED, and LEDs for serial communication signals (RX and TX).

Additionally, there is a 12-bit DAC, CAN bus, and operational amplifier. It also has an onboard ICSP interface that can be utilised as an SPI interface and supports the soldering of additional interfaces for those looking to tailor the board to specific project needs. A USB-C cable is included.

We also stock the PLUS B version!

Features

• Based on R7FA4M1AB3CFM, compatible with the Arduino UNO R4 Minima
• Renesas Electronics’ RA4M1 (Arm® Cortex®-M4) microcontroller
• Equipped with 256 kB Flash and 32 kB RAM
• 12-bit DAC
• CAN bus
• Operational amplifiers
• 5V/3.3V headers for easy voltage switching
• Flexible power options, supporting USB-C power supply or external input power VIN (6V<=VIN<=24V)
• Onboard power indicator LED (PWR), USER LED, serial port receive indicator LED (RX), and transmit indicator LED (TX)
• Onboard ICSP interface

What’s on Board

1. R7FA4M1AB3CFM
2. AMS1117-3.3
   3.3V voltage regulator
3. MP8759
   5V voltage regulator
4. Arduino interface
   Compatible with standard Arduino interface
5. ICSP interface
6. Power output header
   3.3V or 5V, voltage level configured by the onboard power configuration switch, used as power output and common-grounding with other boards
7. Power Configuration
   For configuring R7FA4 PLUS A operating voltage
8. SWD indicator
9. Power indicator
10. User LED
11. USB Type-C connector
    For uploading program or serial port debugging
12. Serial port RX/TX indicators
13. DC input
    6V ~ 24V
14. Reset button

Specifications

Microcontroller	R7FA4 (32-bit ARM Cortex-M4)
Clock Frequency	R7FA4: 48MHz
Storage	R7FA4: 256kB Flash, 32kB RAM
Wireless Communication	None
Operating Voltage	Options for 5V/3.3V, support more shields
Power Input	6~24V
Reset Button	Lateral, easier to use when connecting with a shield
IO Pin Output Current	8mA
Digital Pins	14
Analogue Pins	6
DAC	2
PWM	6
UART	1
I2C	1
SPI	1
CAN	1
DC Jack	Wide power input range 6-24V
Power Output Header	Provides 5V or 3.3V power output and common-grounding with other boards
5V Power Output	Up to 2000mA Max
Experimental Board	Solder pads provided for DIY interfaces

Resources

• Product Wiki
• Schematic

Pinout

Package Contents

• 1x R7FA4 PLUS A Development Board
• 1x USB Type-A to Type-C cable