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Overview

boards/renesas/ek_ra6m2/doc/index.rst

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.. zephyr:board:: ek_ra6m2

Overview

The Renesas RA6M2 microcontroller is the entry point to the Renesas RA6 product series for applications that require a high-performance Arm® Cortex®-M4 core at a very attractive price point. The RA6M2 is suitable for IoT applications requiring security, large embedded RAM and low power consumption.

The key features of the EK-RA6M2 board are categorized in three groups as follow:

MCU Native Pin Access

  • 120MHz Arm Cortex-M4 based RA6M2 MCU in 144 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 - RA6M2 MCU oscillator and sub-clock oscillator crystals, providing precision 12.000 MHz and 32,768 Hz reference clock. Additional low precision clocks are available internal to the RA6M2 MCU

System Control and Ecosystem Access

  • USB Full Speed device

  • 5V input through USB debug

  • Three Debug modes

    • Debug on-board (SWD)
    • Debug in (SWD and JTAG)
    • Debug out (SWD)

  • User LEDs and buttons

    • One User LEDs
    • One User buttons
    • One Reset button

  • Three most popular ecosystems expansions

    • Two Digilent Pmod (SPI and UART) connectors
    • Arduino (Uno R3) connector
    • MikroElektronika mikroBUS connector

  • MCU boot configuration jumper

Special Feature Access

  • USB Full Speed Host and Device (micro-AB connector)

Hardware

Detailed hardware features for the RA6M2 MCU group can be found at RA6M2 Group User's Manual Hardware_

.. figure:: ra6m2_block_diagram.webp :width: 871px :align: center :alt: RA6M2 MCU group feature

RA6M2 Block diagram (Credit: Renesas Electronics Corporation)

Detailed hardware features for the EK-RA6M2 MCU can be found at EK-RA6M2 - User's Manual_

Supported Features

.. zephyr:board-supported-hw::

Programming and Debugging

.. zephyr:board-supported-runners::

Applications for the ek_ra6m2 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-RA6M2 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

  1. Connect to J-Link OB via USB port to host PC

  2. Make sure J-Link OB jumper is in default configuration as describe in EK-RA6M2 - User's Manual_

  3. 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: R7FA6M2AD
  • 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-RA6M2 Website_
  • RA6M2 MCU group Website_

.. _EK-RA6M2 Website: https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra6m2-evaluation-kit-ra6m2-mcu-group

.. _RA6M2 MCU group Website: https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ra6m2-32-bit-microcontrollers-120mhz-medium-size-memory-integration-and-ethernet

.. _EK-RA6M2 - User's Manual: https://www.renesas.com/us/en/document/mat/ek-ra6m2-v1-users-manual-0

.. _RA6M2 Group User's Manual Hardware: https://www.renesas.com/us/en/document/mah/renesas-ra6m2-group-users-manual-hardware

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