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Cost-Effective Digital Cluster with 4-channel AHL and Surround View

Overview

Description

In automotive design, vehicle safety is a top priority. Clusters centralize critical driving information such as speed, fuel, navigation, and warnings to minimize driver distraction. Integrating safety features like the Surround View Monitor (SVM) enhances situational awareness.

This fully digital cluster design utilizes a four-channel Automotive High-Definition Link (AHL) for SVM, offering a cost-effective solution. It reduces costs by up to 30% compared to coaxial connectors by using affordable analog cables and connectors, like the twisted pair connectors common in AHL.

System Benefits​:

  • No latency with excellent picture quality compared to digital transmission at a low cost.
  • Enables responsive automatic dimming control of the display in response to ambient brightness using a light sensor.
  • Reduces R&D cost and development time with power management ICs (PMICs) verified for R-Car M3, ensuring quicker time-to-market.
  • R-Car M3 and PMICs support functional safety up to ISO 26262 ASIL B.

Comparison

Applications

Block Diagram

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AS235WC#AS235AS235Sheet.110Battery.328Sheet.112Sheet.113Sheet.114Sheet.115Label Text 10pt.26212V Battery12V BatteryDynamic connectorLight SensorLight SensorLight SensorTimingTimingTimingPMICPMICPMICSheet.132Double arrow.2150Double arrow.2166Label Text 10pt.2367720720Label Text 10pt.236819201920Cluster application & Sourround ViewCluster application & (Surround View)Cluster application &(Surround View)SoC R-Car M3SoC R-Car M3SoC R-Car M3I2CI2CI2CLVDSLVDSLVDSMIPI CSIMIPI CSIMIPI CSIFlash + DDRFlash + DDRFlash + DDRQuad componentComponent block.751Component block.747Component block.748Component block.74911pt text11pt textRight arrow 1pt.1711Sheet.197Camera.325Sheet.199Sheet.200Camera PMICCamera PMICCamera PMICAHLAHLAHLDown arrow.38Right arrow bracket.32Right arrowAHL 4-ChannelAHL 4-ChannelAHL 4-Channelwireless-connectivity.209Sheet.210Sheet.211Sheet.212Sheet.213wireless-connectivity.214Sheet.215Sheet.216Sheet.217Sheet.218wireless-connectivity.219Sheet.220Sheet.221Sheet.222Sheet.223wireless-connectivity.224Sheet.225Sheet.226Sheet.227Sheet.228Label Text 10pt.2392CamerasCamerasCR7CR7CR7Right arrow 1pt.231Connector Arrow.232Connector 1Sheet.238Sheet.239Connector Arrow.242Connector Arrow.243Connector LineLabel Text 10pt.262.276BrightnessBrightnessConnector Arrow.277Sun.288Sheet.289Sheet.290Sheet.291Cloudy Day.292Sheet.293Sheet.294Sheet.295Moon.296Sheet.297Label Text 10pt.262Lux: Low (0~100 lux) = PWM 40% Lux: Normal (1000~2500 lux) = ...Lux: Low (0~100 lux) = PWM 40%Lux: Normal (1000~2500 lux) = PWM 80%Lux: Too Bright (20000~50000 lux) = PWM 100%Sun.342Sheet.280Sheet.281Sheet.282Cloudy DaySheet.284Sheet.285Sheet.286Moon.344Pre-regulatorPre-regulatorPre-regulator
Exiting Interactive Block Diagram

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