.. _ek_ra4w1:

RA4W1 Evaluation Kit
####################

Overview
********

The Renesas RA4W1 is the first Bluetooth® 5.0 Low Energy fully compliant with 2Mbit High-Throughput
(HT) and Long Range support in a single chip MCU of Renesas RA4  product series for IoT applications
that require a high-performance Arm® Cortex®-M4 core at a very attractive price point. The RA4W1 MCU
has full function support for Bluetooth 5.0 Low Energy long-range and mesh networking, and provides
excellent reception performance. RA4W1 is geared towards IoT application requiring Security, large
embedded RAM and low power consumption.

**MCU Native Pin Access**
- R7FA4W1AD2CNG
- QFN-56 package
- On-chip memory: 512-KB ROM, 96-KB RAM, 8-KB data flash memory

**Power-supply voltage**
- USB connector: 5-V input
- Power-supply IC: 5-V input, 3.3-V output
- External power-supply header*1: 3.3-V input, 2 pins x 1

**Main clock**
- Crystal oscillator (surface-mount technology (SMT)) for the main system clock
- Crystal oscillator or ceramic resonator (lead type) for the main system clock

**Sub-clock**
- Crystal oscillator (SMT) for the sub-clock

**Bluetooth Low Energy**
- Bluetooth Low Energy (BLE) circuit x1
- Range of frequency: 2402 to 2480 MHz
- Maximum transmission output power: 4 dBm (in 4-dBm output mode)
- Output variation: +2 dB

**Push switches**
- Reset switch x 1
- User switch x 1

**LED**
- Power indicator: green x 1
- User: green x 2
- ACT LED: green x 1

**Conetivity**
- Connector for an on-board emulator: USB Micro-B
- Connector for a USB serial-conversion interface: USB Micro-B
- Pmod™ connector: Angle type, 12 pins
- Arduino™ UNO connectors

- Emulator reset switch

.. figure:: ek_ra4w1.webp
	:align: center
	:alt: RA4W1 Evaluation Kit

	EK-RA4W1 Board Functional Area Definitions (Credit: Renesas Electronics Corporation)

Hardware
********
Detail Hardware feature for the RA4W1 MCU group can be found at `RA4W1 Group User's Manual Hardware`_

.. figure:: ra4w1_block_diagram.webp
	:width: 442px
	:align: center
	:alt: RA4W1 MCU group feature

	RA4W1 Block diagram (Credit: Renesas Electronics Corporation)

Detail Hardware feature for the EK-RA4W1 MCU can be found at `EK-RA4W1 - User's Manual`_

Supported Features
==================

The below features are currently supported on Zephyr OS for EK-RA4W1 board:

+-----------+------------+----------------------+
| Interface | Controller | Driver/Component     |
+===========+============+======================+
| GPIO      | on-chip    | gpio                 |
+-----------+------------+----------------------+
| MPU       | on-chip    | arch/arm             |
+-----------+------------+----------------------+
| NVIC      | on-chip    | arch/arm             |
+-----------+------------+----------------------+
| UART      | on-chip    | serial               |
+-----------+------------+----------------------+
| CLOCK     | on-chip    | clock control        |
+-----------+------------+----------------------+
| SPI       | on-chip    | spi                  |
+-----------+------------+----------------------+
| COUNTER   | on-chip    | counter              |
+-----------+------------+----------------------+
| ENTROPY   | on-chip    | entropy              |
+-----------+------------+----------------------+
| ADC       | on-chip    | adc                  |
+-----------+------------+----------------------+
| PWM       | on-chip    | pwm                  |
+-----------+------------+----------------------+
| I2C       | on-chip    | i2c                  |
+-----------+------------+----------------------+

Other hardware features are currently not supported by the port.

Programming and Debugging
*************************

Applications for the ``ek_ra4w1`` 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-RA4W1 via the on-board SEGGER J-Link debugger.
SEGGER J-link's drivers are avaialbe 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-RA4W1 - 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: R7FA4W1AD
* 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-RA4W1 Website`_
- `RA4W1 MCU group Website`_

.. _EK-RA4W1 Website:
   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra4w1-evaluation-kit-ra4w1-mcu-group

.. _RA4W1 MCU group Website:
   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ra4w1-low-energy-single-chip-32-bit-microcontrollers-48mhz-bluetooth-50

.. _EK-RA4W1 - User's Manual:
   https://www.renesas.com/us/en/document/man/ek-ra4w1-users-manual

.. _RA4W1 Group User's Manual Hardware:
   https://www.renesas.com/us/en/document/man/renesas-ra4w1-group-users-manual-hardware

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