Renesas Electronics Corporation
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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-232 AS232 AS232 AS232 Primary Regulator Primary Regulator Primary Regulator 12V Battery Battery Battery Battery Battery Battery 12V Battery 12V Battery 12V Battery Connector Line.410 Sheet.138 Double arrow.2150 Double arrow.2166 1080 (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.153 Connector Line.155 Connector Arrow.157 VSP VSP VSP Connector Arrow.159 UART 1 UART UART Connector double arrow.149 LIN 1 LIN LIN Connector double arrow.148 CAN 1 CAN CAN Connector double arrow.147 QSPI 1 QSPI QSPI Connector double arrow.146 Connector double arrow.151 DRAM DRAM DRAM Connector double arrow Connector Arrow TFT PMIC TFT PMIC TFT PMIC Connector Arrow.156 Backlight LED Driver Backlight LED Driver Backlight LED Driver Connector Line Sheet.169 SPI Flash SPI Flash SPI Flash Connector double arrow.152 Connector Arrow.156 Connector Arrow.171 TTL or LVDS 1024 x 1024 (Max) TTL or LVDS 1024 x 1024 (Max) TTL or LVDS1024 x 1024(Max) MCU MCU MCU MCU VCC VCC VCC UART 2 UART UART LIN 2 LIN LIN CAN 2 CAN CAN QSPI 2 QSPI QSPI I2C I2C I2C DBSC DBSC DBSC LVDS LVDS LVDS

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