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Low-Cost Digital Instrument Cluster

Overview

Renesas provides a low-cost design for digital instrument clusters and HVAC displays, leveraging an MCU and a video signal processor (VSP) scaler.

System Benefits:

  • Simplifies the development of multiple display resolutions with a single design.
  • Scales cluster graphics easily for various display sizes and resolutions.
  • Optimizes power consumption for automotive environments.
  • Generates cluster graphics in one resolution with the RH850 automotive MCU, which can be scaled to different resolutions using the LCD controller.
  • Upscales 1280x480 resolution primary cluster graphics for an 8” LCD panel to 1920x720 to support a 12.3” panel upgrade option for premium trim vehicle models.
  • Enables "fast boot" functionality to display tell-tale lamps at ignition in under 500ms via the LCD controller, allowing the MCU software time to boot properly.

Block Diagram

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AS-232AS232AS232AS232Primary RegulatorPrimary RegulatorPrimary Regulator12V BatteryBatteryBatteryBatteryBatteryBattery12V Battery12V Battery12V BatteryConnector Line.410Sheet.138Double arrow.2150Double arrow.21661080 (Max)1080 (Max)1080(Max)1920 (Max)1920 (Max)1920 (Max)LVDS (1 OR 2 CH)LVDS (1 OR 2 CH)LVDS (1 OR 2 CH)Connector Arrow.153Connector Line.155Connector Arrow.157VSPVSPVSPConnector Arrow.159UART 1UARTUARTConnector double arrow.149LIN 1LINLINConnector double arrow.148CAN 1CANCANConnector double arrow.147QSPI 1QSPIQSPIConnector double arrow.146Connector double arrow.151DRAMDRAMDRAMConnector double arrowConnector ArrowTFT PMICTFT PMICTFT PMICConnector Arrow.156Backlight LED DriverBacklight LED DriverBacklight LED DriverConnector LineSheet.169SPI FlashSPI FlashSPI FlashConnector double arrow.152Connector Arrow.156Connector Arrow.171TTL or LVDS 1024 x 1024 (Max)TTL or LVDS 1024 x 1024 (Max)TTL or LVDS1024 x 1024(Max)MCUMCUMCUMCUVCCVCCVCCUART 2UARTUARTLIN 2LINLINCAN 2CANCANQSPI 2QSPIQSPII2CI2CI2CDBSCDBSCDBSCLVDSLVDSLVDS

MCU

RH850 Automotive MCUs

Primary Regulator

Buck Controllers (External FETs)

VSP

Display Processors

TFT PMIC

Integrated TFT-LCD DC-DC Regulators

Backlight LED Driver

Backlight LED Drivers

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