MCU Starter Kit By Renesas To Precisely Evaluate Industrial Applications

  • Enables analogue characteristics evaluation at nanovolt level
  • Accelerates time to market for IIoT sensors

Renesas Electronics Corporation introduces a new Renesas Solution Starter Kit (RSSK), featuring highly accurate analogue front ends (AFE) for developers working with the 32-bit RX23E-A microcontroller (MCU). The kit integrates hardware and software tools for evaluating the MCU’s high-precision 24-bit delta-sigma (ΔΣ) AD converter with industry-leading accuracy.

The RSSK also enables users without any AFE development expertise to accurately evaluate analogue characteristics to the nanovolt (nV) level, thereby reducing development workload and time-to-market.

Problem-solving capability

Evaluating analogue characteristics with high precision requires strong analogue design and development expertise, from evaluation board design to software development. Additionally, when the desired characteristics cannot be obtained, then problem identification and analysis are time-consuming, making it difficult to bring products to market on time.


Therefore, the new RSSK evaluation board has been designed to optimize evaluation of the RX23E-A AFE, which allows users to check characteristics of the 24-bit ΔΣ AD converter with high accuracy, regardless of analogue development expertise levels. The evaluation board is equipped with a plug-in terminal block to connect a variety of sensors without soldering, a thermocouple (temperature sensor) connector and reference junction compensation circuit (required for thermocouple measurement applications). By referencing thermocouple and weight measurement application software, users can immediately start their evaluation, thereby shortening the time needed to develop IoT sensor devices.

Interactive display

Using the kit’s graphical user interface (GUI) tool, users can enter and change settings for a variety of AFE and AD converter parameters, as well as display graphs and histograms of AD conversion results, thus allowing users to check them in real-time. This simplifies the task of evaluating characteristics matched to the user’s system.

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Promoting industrial development

The evaluation board can also be connected to an emulator to develop user applications. Power is supplied via the USB connection, so both evaluation and software development can be accomplished using a PC. Driver ICs for RS485 and CAN, which are widely used in industrial devices, are also mounted on the evaluation board, allowing the development of applications with industrial networking standards support.

“The RX23E-A for industrial IoT sensors is a single-chip device incorporating one of the industry’s most highly accurate AFEs, featuring less than 0.1 per cent precision without calibration,” said Daryl Khoo, Vice President of Marketing, IoT Platform Business Division at Renesas. “The new solution kit provides a shortcut for customers interested in evaluating and calibrating various sensor types to shorten the time required to develop more highly accurate sensing equipment.”

RX23E-A Group of MCUs    

The RX23E-A Group of 32-bit MCUs with DSP/FPU support operate at 32 MHz and feature an AFE that achieves less than 0.1 per cent measurement precision without calibration. The integrated ΔΣ AD converter has a maximum effective resolution of 23.6 bits, enabling this single chip to deliver analogue functionality; previously only possible when an MCU is used in combination with a dedicated AD converter or a high-precision op-amp IC.

The RX23E-A Group MCUs are widely used in industrial meter applications such as temperature controllers, load cells, and strain gauge sensor modules.


The RX23E-A RSSK is available now.

Thermocouple and weight measurement application software are both available for download on the Renesas website.



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