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瑞萨电子 (Renesas Electronics Corporation)

USB-C Platform with Liquid Detection and Debug Access

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描述

USB Type-C® is widely used in compact consumer and portable devices because it supports charging, data transfer, and system access through a single connector. In everyday use, moisture or small liquid droplets can enter the USB-C port and affect normal operation. At the same time, development and manufacturing often require additional connectors for programming and testing, increasing system complexity and cost. This design handles liquid detection and debug access through the same USB-C interface, improving connector robustness while reducing hardware complexity, PCB space, and manufacturing effort.

The charging cradle design is optimized for power-focused applications, delivering efficient charging and compact system integration for products that use USB-C as the primary interface. It is well-suited for True Wireless Stereo (TWS), hearing aid, and wearable charging cradles, where reliable charging, a small form factor, and simplified manufacturing are key requirements.

The audio system design is optimized for data-focused applications, supporting stable USB-C communication and digital audio streaming in compact systems. It is intended for speakerphones and wired headsets, where consistent audio performance and efficient system integration are essential.

System Benefits:

  • Fast, low-power USB-C liquid detection implemented using a programmable mixed-signal device improves connector safety and long-term reliability, while supporting flexible design and efficient manufacturing in space-constrained systems.
  • USB-C debug accessory mode enables connector-less programming, debugging, and production testing, reducing development effort and manufacturing complexity.
  • Integrated battery charging and power management simplify power design and support efficient operation.
  • Bluetooth® Low Energy (LE) connectivity enables system monitoring, control, and configuration.

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该板卡已上线云上实验室(Lab on the Cloud),使用我们的 PC 图形界面,无需实体板卡,便可在虚拟实验室中立即开始配置和测试设计。

USB-C TWS Charging Cradle with Liquid Detection and Debug Accessory Mode

WS195-1Line Bi-directional.633Line Bi-directional.634Line Bi-directional.631Line Bi-directional.632Sheet.626Line.629Line.615Line.331Line.325Line.329Sheet.1Sheet.2Sheet.3Sheet.4ShuntSheet.61Sheet.62Sheet.63Sheet.76+++---Sheet.79Line 1pt.1552Line 1pt.1583Sheet.82Sheet.109Sheet.110Darlington.111Sheet.112Sheet.113Darlington.254Sheet.115Sheet.116Darlington.254Sheet.207Sheet.215Sheet.216Sheet.235Sheet.236Sheet.237Sheet.238Sheet.239Sheet.240Sheet.241Sheet.243Sheet.85Sheet.86Sheet.242VBATVBATVBATSheet.253Sheet.262Connector 1.264Sheet.265Rx/TxRx/TxRx/TxVsys/VBATVsys/VBATVsys/VBATCh1/2Ch1/2Ch1/2Sheet.277Sheet.278Darlington.131Sheet.280Sheet.281Darlington.254Sheet.283Sheet.284Darlington.254Sheet.287Sheet.288Darlington.289Sheet.290Sheet.291Darlington.254Sheet.293Sheet.294Darlington.254Sheet.297Sheet.298Darlington.299Sheet.300Sheet.301Darlington.254Sheet.303Sheet.304Darlington.254Bluetooth Low EnergyBluetooth Low EnergyBluetooth Low EnergySheet.309Sheet.447VBUSVBUSVBUSCC2CC2CC2USB-CUSB-CUSB-CSheet.456Sheet.457Sheet.458Sheet.459Sheet.460Sheet.461Sheet.462Sheet.463Sheet.464Sheet.465Sheet.466Sheet.467Sheet.468CC1CC1CC1D+D+D+D-D-D-Line Bi-directional.134Line Bi-directional.135Line Bi-directional.136Line Bi-directional.137Line Bi-directional.138Line Bi-directional.139SBU1SBU1SBU1SBU2SBU2SBU2TxTxTxLine Bi-directional.211RxRxRxLineFET n-channel.208FET n-channelSheet.538Sheet.539Sheet.540Sheet.541Sheet.542Sheet.543Sheet.544Ground - EarthSheet.546Sheet.547Sheet.548Sheet.549Resistor - Fixed.368Line.369Line.373FET n-channel.374FET n-channelSheet.556Sheet.557Sheet.558Sheet.559Sheet.560Sheet.561Sheet.562Ground - Earth.383Sheet.564Sheet.565Sheet.566Sheet.567Resistor - Fixed.389Line.390Line.317Resistor - Fixed.318Line.319Line.320Line.398Line.399Line.323Line.324Resistor - Fixed.326Resistor - Fixed.327Resistor - Fixed.328Line.330VDD/GNDVDD/GNDVDD/GNDGND/VDDGND/VDDGND/VDDLine.392Line.393Line.394Resistor - Fixed.395Resistor - Fixed.396Line.401Line.603Line.607Line.610Line Arrow.614Sheet.619Line.620Sheet.621Line.622LDOLDOLDOLine.6283.3V3.3V3.3VHall SensorHall SensorHall SensorSheet.638Line.639Sheet.640Sheet.641Line.642EarbudsEarbudsEarbudsSheet.648Sheet.650Line.652Sheet.653Sheet.655Sheet.656Bi-directionalConnector 1.117WS195-1WS195-1WS195-1Sheet.686GreenPAKGreenPAKGreenPAKGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOI2CI2CI2CSheet.687


 MCUMCUMCU I2CI2CI2CGPIOsGPIOsGPIOsADCADCADCUARTUARTUARTUSB-CUSB-CUSB-CUSB FSUSB FSUSB FSSWDSWDSWDGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOUSB VBUSUSB VBUSUSB VBUSSheet.688Charger PMICCharger PMICCharger PMICVsysVsysVsysI2CI2CI2CBoostBoostBoostLDOLDOLDOLDOLDOLDOBuck ChargerBuck ChargerBuck ChargerVBUSVBUSVBUSGPIOGPIOGPIO
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USB‑C Audio System with Liquid Detection and Debug Accessory Mode

WebLine.325Connector Line.377Connector Line.378Connector LineConnector Line.475CC2CC2CC2USB-CUSB-CUSB-CSheet.229Sheet.230Sheet.231Sheet.232Sheet.233Sheet.234Sheet.235Sheet.236Sheet.237Sheet.238Sheet.239Sheet.240Sheet.241Line Bi-directionalLine Bi-directional.26Connector Arrow.245CC1CC1CC15V5V5V3.3V3.3V3.3VLine.126Line Bi-directional.131Line Bi-directional.132TxTxTxRxRxRxConnector Arrow.255Connector Line.333Connector Line.272FET n-channel.208FET n-channelSheet.278Sheet.279Sheet.280Sheet.281Sheet.282Sheet.283Sheet.284Ground - EarthSheet.286Sheet.287Sheet.288Sheet.289Line.367Resistor - Fixed.368Line.369Line.373FET n-channel.374FET n-channelSheet.299Sheet.300Sheet.301Sheet.302Sheet.303Sheet.304Sheet.305Ground - Earth.383Sheet.307Sheet.308Sheet.309Sheet.310Line.388Resistor - Fixed.389Line.390Line.394Resistor - Fixed.318Line.319Line.320Line.398Line.399Line.323Line.324Resistor - Fixed.326Resistor - Fixed.327Resistor - Fixed.328Line.329Line.330Line.331Connector Line.412VDD/GNDVDD/GNDVDD/GNDGND/VDDGND/VDDGND/VDDTri component non Renesas.342Component block.631SwitchSwitchSwitchConnector Arrow.345Vertical Wire Bundle.346NNNSheet.348xNxNxNLine Bi-directional.354Line Bi-directional.355Microphone.356Sheet.357Sheet.358Speaker.359speaker_8_Sheet.361Sheet.362Sheet.363Sheet.364Line Arrow.365Line Arrow.366Line Arrow.367Line Arrow.368Connector Arrow.369Connector Line.373Connector Line.374D-D-D-Line Bi-directional.381Line Bi-directional.382D+D+D+Line Bi-directional.384Line Bi-directional.385SBU1SBU1SBU1SBU2SBU2SBU21.8V1.8V1.8VVBUSVBUSVBUSLineLine.392Line.393Line.394Resistor - Fixed.395Resistor - Fixed.396Connector ArrowBi-directionalFET n-channel.437FET n-channelSheet.439Sheet.440Sheet.441Sheet.442Sheet.443Sheet.444Sheet.445Ground - Earth.446Sheet.447Sheet.448Sheet.449Sheet.450FET n-channel.453FET n-channelSheet.455Sheet.456Sheet.457Sheet.458Sheet.459Sheet.460Sheet.461Ground - Earth.462Sheet.463Sheet.464Sheet.465Sheet.466Line.471Line.472Connector Line.479WS195-2WS195-2WS195-2Buck RegulatorBuck RegulatorBuck RegulatorAudio CodecAudio CodecAudio CodecSheet.481MCUMCUMCUUSB CCUSB CCUSB CCGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOI2SI2SI2SI2CI2CI2CGPIOGPIOGPIOUSB FSUSB FSUSB FSSWDSWDSWDUSB VBUSUSB VBUSUSB VBUSI2CI2CI2CGPIOGPIOGPIOGPIOGPIOGPIOSheet.482GreenPAKGreenPAKGreenPAKGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOGPIOI2CI2CI2C
Exiting Interactive Block Diagram

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