.. zephyr:board:: voice_ra4e1

Overview

VOICE-RA4E1 is an edge voice recognition evaluation kit designed to be used by Ecosystem Partners, Application Engineers, Field Application Engineers, and for Business Development opportunities. The primary purpose is to evaluate the functionality of projects developed by Ecosystem Partners, and to facilitate the development of additional partner projects. The kit design to use the RA4E1 MCU with QFN 48pin package as the core logic device, with QSPI flash, OPAMP and power devices chosen from the Renesas product portfolio.

The MCU in this series incorporates a high-performance Arm Cortex®-M33 core running up to 100 MHz with the following features:

MCU Native Pin Access

R7FA4E10D2CNE MCU (referred to as RA MCU)
100 MHz, Arm® Cortex®-M33 core
512 KB Code Flash, 8 KB Data Flash, 128 KB SRAM
48 pins, LQFP package
MCU current measurement point for precision current consumption measurement
Multiple clock sources - Low-precision (~1%) clocks are available internal to the RA MCU.

Kit Peripheral Features

Following is a list of the specific features that have been implemented:

QSPI: One QSPI flash memory device, Dialog AT25SF641B-MHB-T, 64M-bit (8MB).
PMOD: 1 Digilent PMOD connectors, supporting UART, SPI and I2C configurations.
Microphones: 1 I2S MEMS digital microphones and 2 MEMS analog microphones, distance between each pair of microphones is 50mm which is suitable for beamforming applications.
Audio out: One stereo audio headphone jack supporting mono output on both channels.
LEDs: Five LEDs, D2 (Red), D3 (Green) and D4 (Blue) configurable by user, D5 (Blue) as a 3.3V power indicator, D8(Green) as a JLOB (J-LINK on board) indicator.
Buttons: One RESET button (S2), and one USER button (S1).
Debug: J-Link On-Board debug interface, supporting JTAG or SWD debug port.
USB: Micro USB-B (J6) for power input and J-Link On-Board function, USB-C (J1) for power input and RA4E1 USB Full Speed port as a USB device.
Form Factor: 7.5 x 6 cm

Hardware

Detailed hardware features can be found at:

RA4E1 MCU: RA4E1 Group User's Manual Hardware_
VOICE-RA4E1 board: VOICE-RA4E1 - Engineering Manual_

Supported Features

.. zephyr:board-supported-hw::

Programming and Debugging

.. zephyr:board-supported-runners::

Applications for the voice_ra4e1 board 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 VOICE-RA4E1 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 VOICE-RA4E1 - Engineering 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: R7FA4E10D
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

VOICE-RA4E1 Website_
RA4E1 MCU group Website_

.. _VOICE-RA4E1 Website: https://www.renesas.com/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/tw001-vuia4e1pocz-ra4e1-voice-user-reference-kit

.. _RA4E1 MCU group Website: https://www.renesas.com/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ra4e1-100mhz-arm-cortex-m33-entry-line-balanced-low-power-consumption-optimized-feature-integration

.. _VOICE-RA4E1 - Engineering Manual: https://www.renesas.com/en/document/mat/voice-ra4e1-engineering-manual

.. _RA4E1 Group User's Manual Hardware: https://www.renesas.com/en/document/mah/ra4e1-group-users-manual-hardware

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