.. zephyr:board:: ek_ra6m3

Overview

The Renesas RA6M3 group uses the high-performance Arm® Cortex®-M4 core and offers a TFT controller with 2D accelerator and JPEG decoder. The RA6M3 is suitable for IoT applications requiring TFT, Ethernet, security, large embedded RAM, and USB High Speed (HS).

The key features of the EK-RA6M3 board are categorized in three groups as follow:

MCU Native Pin Access

120MHz Arm Cortex-M4 based RA6M3 MCU in 176 pins, LQFP package
Native pin access through 4 x 40-pin male headers
MCU and USB current measurement points for precision current consumption measurement
Multiple clock sources - RA6M3 MCU oscillator and sub-clock oscillator crystals, providing precision 24.000 MHz and 32,768 Hz reference clock. Additional low precision clocks are available internal to the RA6M3 MCU

System Control and Ecosystem Access

USB Full Speed Host and Device (micro AB connector)
Four 5V input sources
- USB (Debug, Full Speed, High Speed)
- External power supply (using surface mount clamp test points and power input vias)
Three Debug modes
- Debug on-board (SWD)
- Debug in (ETM, SWD and JTAG)
- Debug out (SWD)
User LEDs and buttons
- Three User LEDs (red, blue, green)
- Power LED (white) indicating availability of regulated power
- Debug LED (yellow) indicating the debug connection
- Two User buttons
- One Reset button
Four most popular ecosystems expansions
- Two Seeed Grove system (I2C) connectors
- Two Digilent Pmod (SPI and UART) connectors
- Arduino (Uno R3) connector
- MikroElektronika mikroBUS connector
MCU boot configuration jumper

Special Feature Access

Ethernet (RJ45 RMII interface)
USB High Speed Host and Device (micro-AB connector)
32 Mb (256 Mb) External Quad-SPI Flash

Hardware

Detailed hardware features for the RA6M3 MCU group can be found at RA6M3 Group User's Manual Hardware_

.. figure:: ra6m3_block_diagram.webp :width: 442px :align: center :alt: RA6M3 MCU group feature

RA6M3 Block diagram (Credit: Renesas Electronics Corporation)

Detailed hardware features for the EK-RA6M3 MCU can be found at EK-RA6M3 - User's Manual_

Supported Features

.. zephyr:board-supported-hw::

Programming and Debugging

.. zephyr:board-supported-runners::

Applications for the ek_ra6m3 board target configuration can be built, flashed, and debugged in the usual way. See :ref:build_an_application and :ref:application_run for more details on building and running.

Flashing

Program can be flashed to EK-RA6M3 via the on-board SEGGER J-Link debugger. SEGGER J-link's drivers are available at https://www.segger.com/downloads/jlink/

To flash the program to board

Connect to J-Link OB via USB port to host PC
Make sure J-Link OB jumper is in default configuration as describe in EK-RA6M3 - User's Manual_
Execute west command

.. code-block:: console
```
 west flash -r jlink
```

Debugging

You can use Segger Ozone (Segger Ozone Download_) for a visual debug interface

Once downloaded and installed, open Segger Ozone and configure the debug project like so:

Target Device: R7FA6M3AH
Target Interface: SWD
Target Interface Speed: 4 MHz
Host Interface: USB
Program File: <path/to/your/build/zephyr.elf>

Note: It's verified that we can debug OK on Segger Ozone v3.30d so please use this or later version of Segger Ozone

References

EK-RA6M3 Website_
RA6M3 MCU group Website_

.. _EK-RA6M3 Website: https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra6m3-evaluation-kit-ra6m3-mcu-group

.. _RA6M3 MCU group Website: https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ra6m3-32-bit-microcontrollers-120mhz-usb-high-speed-ethernet-and-tft-controller

.. _EK-RA6M3 - User's Manual: https://www.renesas.com/us/en/document/mat/ek-ra6m3-v1-users-manual

.. _RA6M3 Group User's Manual Hardware: https://www.renesas.com/us/en/document/mah/ra6m3-group-users-manual-hardware

.. _Segger Ozone Download: https://www.segger.com/downloads/jlink#Ozone