RA0E1 Fast Prototyping Board

We’ll guide first‑time users of the RA family through installing a development environment, generating a project, and checking basic operation using the RA0E1 Fast Prototyping Board. The board paired with a J‑Link ARM debugger is used as the practical example to help new developers get started quickly and confidently.

Learn how to configure the RA0E1 Fast Prototyping Board to receive universal asynchronous receiver/transmitter (UART) data while the device operates in Software Standby mode, a low‑power operating state.

This video demonstrates how an incoming UART signal can trigger a receive interrupt that wakes the device from low‑power operation to normal mode, allowing communication to continue while minimizing power consumption. The example uses the RA0E1 Serial Interface UART‑A, a device‑specific UART channel, to illustrate how UART communication remains available in low‑power applications.

Learn how we operate Serial Peripheral Interface (SPI) communication on the RA0E1 Fast Prototyping Board using the Serial Array Unit. We configure the RA0E1 device as a Serial Peripheral Interface master, write and read data through the Serial Array Unit, and demonstrate a complete communication example using the included demo package.

Learn how we use the Serial Array Unit (SAU) on the RA0E1 Fast Prototyping Board to communicate with a human presence sensor through Universal Asynchronous Receiver/Transmitter (UART) operation. We configure the SAU to receive sensor data through the TXD and RXD pins and analyze the incoming values to determine whether a person is near the sensor. This content supports evaluation of UART‑based sensor interfaces and helps accelerate development of RA0E1 applications that rely on real‑time presence detection.

The clock generation circuit Flexible Software Package (FSP) module supports runtime updates to clock settings, and in this example, the system clock source is switched to the low‑speed on‑chip oscillator. Using a lower‑frequency clock helps reduce current consumption.

Learn how to use the Event Link Controller, a hardware feature that routes event requests from one peripheral module to another, enabling direct cooperation without CPU intervention. In this example, an external interrupt is linked to driving a pin output. The Flexible Software Package (FSP) module supports configuring and operating the Event Link Controller.

Learn how the RA0E1 Fast Prototyping Board (FPB) operates in low‑power modes and returns to normal operation when a specified interrupt occurs. In this example, the interrupt source is the overflow of the 32‑bit Interval Timer (TML32). Use FSP to easily configure and manage low‑power mode behavior.

Learn how to use the low voltage detector (LVD) on the RA0E1 fast prototyping board (FPB). The LVD module monitors the voltage input to the VCC pin, with detection levels selectable through register settings at various thresholds. The r_lvd module in FSP provides full support for configuring and using the Low Voltage Detector.

This video demonstrates how to detect human movement using a digital PIR sensor with the FPB-RA0E1. This video demonstrates motion detection using the RA microcontroller for practical sensing applications.

Learn how to interface a 10cm water level sensor for Arduino with the RA0E1 Fast Prototyping Board. This video demonstrates how to measure and monitor water levels using the RA microcontroller.

Learn how to connect and use an infrared proximity sensor with the RA0E1 Fast Prototyping Board. This video provides a step-by-step demonstration of sensor operation and integration using the RA microcontroller.

Learn how to control an optocoupler relay using the GPIO pin write function on the RA0E1 fast prototyping board. This video provides a clear, step-by-step demo of relay control using the RA microcontroller platform.

This video demonstrates how to set up an RA project as I²C slave device using the RA0E1 fast prototyping board.

This video demonstrates how to read an analog signal using the RA0E1 fast prototyping board.

This video demonstrates how to utilize various low-power modes on the RA0E1 fast prototyping board.

This video demonstrates how to use the Real Time Clock (RTC) on the FPB-RA0E1.

This video demonstrates how to use the Watchdog Timer on the FPB-RA0E1 board.

This video demonstrates how to implement a Blinky project on the FPB-RA0E1 board and shows how to use UART for communication.

Related Resources

• RA0E1 Fast Prototyping Board

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This video explains how to build the Renesas BSP using a Renesas-prepared Docker container when an Ubuntu machine with the required version is not available.

Watch the RA0E1 demonstration video to see the low-power operation in the various power modes, as well as sensor data collection use case. Reduce power, lower BOM cost and simplify your design cycle with RA0E1 MCUs.

An overview of the RA0E1 entry-level, ultra-low power general purpose MCUs and how the optimized peripherals simplify system design for a wide range of cost-sensitive applications.