Realizing Low Power Consumption of the Capacitive Touch Sensors with Renesas‘ RX140 MCU

时间： 2022-11-12 来源：Renesas Blogs

技术问答

In recent years, more and more products are being equipped with environment-friendly devices and batteries, and the demand for low power consumption in HMI applications such as capacitive touch sensors is also growing.

For the detection of touch, it is necessary for the CPU to periodically measure and judge for touch detection. Since the RX MCU that has a Capacitive Touch Sensor Unit (CTSU) cannot perform these processes in a low power mode, power consumption has been a challenge. The solution to this is to use the RX140 snooze mode and the automatic judgment function of the CTSU2SL^*Note. With these functions, RX140 is capable of touch measurement and judgment in snooze mode, keeping power consumption low. When using this together with the Multiple Electrode Connection (MEC) function of the CTSU2SL, users can further reduce power consumption.

The MEC is a function that measures multiple touch buttons as a single touch button. With this function, it is possible to handle the need for multiple measurements in one single measurement. The shorter the measurement time it takes, the less power it consumes.

*Note:
The CTSU2SL is incorporated in the products with 128KB flash memory or more. The products with 64KB flash memory incorporate CTS2L that don’t support automatic judgment and the MEC functions.

we will show you an application example using the automatic judgment function and the MEC function.

In the standby state, the MEC function allows for addressing multiple touch buttons as a single activation touch button. The automatic judgment function makes it possible to keep power consumption low while operating these touch buttons in the standby state. After activation, these are used as normal touch buttons.

The evaluation environment used for developing this program:

Capacitive Touch Evaluation System for RX140
Touch Middleware/CTSU Driver FIT Module Rev2.10
Tuning Tool: QE for Capacitive Touch V3.1.0

The capacitive touch evaluation system for RX140 is a kit that makes it easy for users to evaluate every feature of touch solutions. By using FIT and QE, you can easily create software that maintains power consumption at a low level.

发送到邮箱 |
+1 赞 0
收藏
评论 0
| 转发至：

本文由深蓝的鱼转载自Renesas Blogs，原文标题为:Realizing Low Power Consumption of the Capacitive Touch Sensors with RX140!，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

全部评论（0）

暂无评论

【经验】一文让你了解DSP与MCU区别

世强代理有Silicon Labs EFM8/EFM32系列8位MCU/32位MCU，Renesas 汽车级MCU RL78 系列，RH850、V850系列，工业级MCU RX系列等。世强有代理进芯电子32位浮点DSP，32位定点DSP，16位DSP，国内唯一可批量供货的32位工业控制DSP供应商。

设计经验发布时间 : 2018-08-02

【经验】瑞萨RX系列MCU使用DMA+SPI传输数据

瑞萨RX使用DMA+SPI传输数据的步骤

设计经验发布时间 : 2021-07-21

【经验】瑞萨RX系列MCU基于GPT实现任意角度移相全桥互补PWM

世强代理的瑞萨电子的RX系列MCU具有丰富的控制功能，而且我们可以根据电源应用的需求，使用瑞萨RX系列的MCU软件实现任意角度移相全桥。本文介绍RX系列如何利用GPT软件实现任意角度移相全桥互补PWM。

设计经验发布时间 : 2017-06-29

华芯微特（Synwit）32位MCU选型指南

目录- 公司介绍&产品分类 TFT-LCD 显示和人机界面（HMI）用微控制器电机专用微控制器大家电 & 工控通用微控制器 32位微控制器选型表

型号- SWM34X,SWM320 SERIES,SWM 201C6T7-50,SWM19SCBT6-50,SWM190 SERIES,SWM 201 系列,SWM32SRET6,SWM181CCT6-50,SWM260KBT7-80,SWM190KBT6-80,SWM201G6S7-65,SWM 201,SWM 201G6S7-65,SWM 19S 系列,SWM201,SWM260 SERIES,SWM320,SWM19S,SWM160,SWM20PG6S6,SWM20D,SWM32SRET6-50,SWM 20PG6S6-65,SWM 190,SWM181CBT6-50,SWM260CBT7-50,SWM260PBT7-80,SWM 260 系列,SWM32S,SWM181 SERIES,SWM181RCT6-50,SWM20P,SWM260CBT7,SWM160C8T7-50,SWM190CBT6-50,SWM20G,SWM 190 系列,SWM 260,SWM 181,SWM201 SERIES,SWM320RET7-50,SWM181DBU6-40,SWM181CBT6,SWM160 SERIES,SWM 341,SWM 341 系列,SWM190 系列,SWM201C6T7-50,SWM 181 系列,SWM320VET7-50,SWM341,SWM190RBT6-50,SWM20PG6S6-65,SWM260,SWM181,SWM320CET7-50,SWM190

选型指南 - 华芯微特 - 2021/3/15 PDF 中文下载

【视频】极海APM32F407xG系列MCU培训

型号- APM32F405VGT6,APM32F091VCT6,APM32F051K6T6,APM32F091CCT6,APM32F003F6P6,APM32F051K8T6,APM32F103CCT6,APM32F405RGT6,APM32F003F6P7,APM32F103VET6,APM32E103VCT6,APM32F051C8T6,APM32F103RCT6,APM32E103ZET6,APM32F103RCT7,APM32F103VCT6,APM32F103ZET6,APM32E103RCT6,APM32E103VET6,APM32F415RGT6,APM32F407RGT6,APM32F030RCT6,APM32F091RCT6,APM32F003F6U7,APM32E103CET6,APM32F407RET6,APM32F407VGT6,APM32F415VGT6,APM32F407VET6,APM32F051K8U6,APM32F051C8U6,APM32F103TBU6,APM32F417VGT6,APM32F103RET6,APM32F051R8T6,APM32F417ZGT6,APM32F405ZGT6,APM32F051K6U6,APM32F030CCT6,APM32F030C8T6,APM32F103CBT6,APM32F103C8T6,APM32F030K6T6,APM32F030R8T6,APM32F103VBT6,APM32F103RBT6,APM32F407ZET6,APM32F407ZGT6,APM32F072VBT6,APM32F072RBT6,APM32F072RBT7,APM32F415ZGT6,APM32F407IET6,APM32F072CBT6,APM32F407IGT6,APM32F030K6U6,APM32E103RET6

商品及供应商介绍 - 极海半导体 PPTX 中文下载

【IC】内核创新，智驱未来！思瑞浦TPS32 MCU荣获2024年度产品飞跃奖

思瑞浦精彩亮相深圳elexcon 2024，展示旗下MCU产品线TPS325M0产品系列和TPS325M5产品系列，及其在智能门锁、HMI等领域的终端应用。思瑞浦TPS32 MCU以高得分荣获“2024年度产品飞跃奖”。

产品发布时间 : 2024-09-12

【应用】极海半导体MCU APM32F103系列用于HMI人机界面，可满足HMI功耗调整、蓝牙通信等需求

本文推荐采用极海半导体推出的APM32F103系列MCU作为HMI人机界面的主控，最高96MHz工作频率，FLASH 256K，SRAM 64K，支持FPU单元；资源丰富，有CRC/RTC/DMA通道，两个DMA；通信接口丰富。

应用方案发布时间 : 2023-05-25

匠芯创MCU选型表

匠芯创提供以下MCU，主要应用于HMI、医疗分析仪、车载显示器、厨电控制屏、仪表盘、网关、串口服务器、仪表盘等。

RISC-V 64bit @504MHz 1.1V @600MHz 1.2V

Built-In DDR2 16bit 533Mhz 512Mb

external SPI NAND/Nor Flash, eMMC 4.5

MIPI/RGB888/LVDS 1080P@60fps

Built-In 4线RTP，两点触摸

DVP&BT.656 5M 1080p@30fps

Encode JPEG 8192x8192 Decode H.264 1080p@30fps Decode MJPEG 8192x8192 Decode PNG 4096x4096

1xAMIC, 2xDMIC&SPK, 1xI²S, 2xPCM

1xEMAC

1xUSB 2.0

SPI总线加密，安全启动，固件加密，固件防回退，AES、TDES、HMAC、SHA、MD5、RSA、TRNG硬件加速

﹣20℃~105℃

盘168 包1680

HMI、医疗分析仪、车载显示器等

选型表 - 匠芯创立即选型

展会邀请 | 思瑞浦MCU产品及参考方案亮相elexcon 2024

8月28日在展会 “IoT与MCU生态建设” 论坛上，思瑞浦MCU事业部产品线经理胡松华将发表主题为《TPS325M系列MCU产品——专注多合一智能门锁、HMI TFT显示+电容触控方案》的演讲。

厂牌及品类发布时间 : 2024-08-28

雅特力携多款AT32 MCU新品与应用方案亮相2024慕尼黑上海电子展

7月8日，2024慕尼黑上海电子展electronica China在上海新国际博览中心拉开序幕，作为全球电子行业的盛会，汇聚了国内外众多优质电子企业。雅特力携高性能AT32 MCU与应用方案齐亮相，呈现了多款电机控制、工业控制、汽车电子、智能家居、消费、商务，及新能源等应用方案。现场人流攒动、氛围热烈！

厂牌及品类发布时间 : 2024-07-17

【应用】极海MCU APM32F103系列用于人机界面产品，可满足HMI功耗调整、蓝牙通信等多样化需求

HMI人机界面方案采用APM32F103系列作为主控，通过SPI接口连接LCD和NFC模块，通过GPIO口驱动LED灯，通过按键输入控制信号，通过I²C接口与EEPROM通信，外置8M晶振提供时钟信号，使用超低功耗蓝牙4.2 SoC GW8811。

应用方案发布时间 : 2023-05-17

FSC-BT3131 Bluetooth 5.3 Wireless MCU Module Datasheet

型号- FSC-BT3131

数据手册 - FEASYCOM - Version 1.0 - 2023/07/05 PDF 英文下载

Geehy APM32F407 Industrial HMI Solution Enhances Interactive Experience

The solution adopts APM32F407 high-performance MCU, 8080 interfaces, LCD, and I²C touch screen as the main control. It offers flexibility, convenience, and efficiency in meeting the specific requirements of equipment parameter display and control parameter setting.

应用方案发布时间 : 2023-06-12

雅特力发布全新超值型AT32F423系列MCU，预计2023年5月正式投入量产供货，以高性价比抢攻高性能应用市场

雅特力正式推出AT32F423系列超值型Cortex®-M4F MCU，内建单精度浮点运算单元（FPU），支持多管脚及封装选择，具备高效能、高集成和高性价比等特点，为AT32家族超值型产品线又增添了一名生力军。AT32F423片上集成丰富外设资源，提供高速的数据传输及处理能力，聚焦超低预算开发需求，同时兼顾成本敏感及高性能需求的嵌入式应用。

厂牌及品类发布时间 : 2023-04-22