Touch Key, Voice Recognition and Cloud Connectivity With a Single 32-bit RX671 MCU

2022-03-10 Renesas
32-bit MCU,RX671,RENESAS

In recent years, hygienic UI (User Interface) control are the key requirement for the main controlling function of industrial/consumer equipment. Remote control of air conditioner is no exception, and the following controlling functions are being considered for implementation: a touch key function that is easy to maintain, voice recognition function for contactless control, and remote controlling function via the cloud. I believe that many developer are about to develop their future products with these functions.


On the other hand, there are many cases where the MCU used in the main system of conventional industrial/consumer equipment does not have the peripheral functions to implement the UI for touch key or voice recognition, so additional components are needed for the implementation of these functions.


Wouldn’t it be nice to have a MCU that can achieves higher performance than existing MCUs and realizes these functions in a single chip? Renesas has launched the 32-bit MCU RX671 in our mainstream RX600 series lineup to solve this challenge.


The RX671 incorporates the peripheral functions for touch keys and voice recognition and has the performance that can enables cloud connectivity(RXv3 core running at 120MHz, 2MB flash memory and 384KB SRAM). It can realize those functions in a single chip. Therefore, comparing to a multi-chip configuration, it is possible to shorten the development time by reducing the number of components and simplifying the system.


Now, I will introduce the reference demo for the evaluation of these functions. This demo resemble the remote-control function of an air conditioner , and it is capable of starting air-blowing function, changing of mode, and setting the temperature by voice or touch. In addition, through connecting to the AWS’s cloud, you can monitor and change the temperature setting via the cloud.


The biggest advantage of using this demo is to manage multiple functions in a project, which is not an easy task. For example, voice recognition function requires to execute the voice processing within a certain period of time, and the management of this within this specific period is critical in implementing multiple functions.


In this demo, multiple functions are provided in combined single project. By referring to the demo, you can quickly address the challenge and reduce the development time and workloads of the PoC or products.


This demo uses a commercially available Renesas RX671 Starter Kit+ and a Wi-Fi Pmod Expansion Board for cloud connectivity evaluation.

How was it? The shifting from a mechanical key to a touch key, voice recognition, and/or remote control with cloud connectivity is happening not only to remote controller of air conditioner but also the UI of many industrial/consumer equipment. Please try this demo to meet these new demands.

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