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Automotive Camera System with AHL Control Channel

Overview

The combination of Renesas MCU and automotive high-definition link (AHL) devices enables the use of only a twisted pair cable for video transmission and control camera systems such as rear camera, surround view, and electronic door mirror. This system utilizes a blower to remove water droplets from the camera lens in rainy weather.

System Benefits​:

  • The I2C signal that controls the blower motor can be superimposed on the video signal of the Renesas video transmission system AHL. Therefore, data transmission is possible only with the twisted pair cable, contributing to low cost and light weight.
  • Shorten development period and cost by using the AHL camera and evaluation board, which provides an environment for quick and easy development.

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AS-245 AS245 AS245 AS245 12V Battery 12V Battery .178 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery Camera PMIC Camera PMIC Camera PMIC AHL Tx AHL Tx AHL Tx MCU 1 MCU MCU LDO 1 LDO LDO Buck Regulator Buck Regulator Buck Regulator AHL Rx AHL Rx AHL Rx MCU 2 MCU MCU LDO 2 LDO LDO Twisted Pair Cable.127 Sheet.128 Sheet.129 Sheet.130 Sheet.131 Cluster Display Cluster Display ClusterDisplay Body Control Body Control Body Control Imager + ISP Imager + ISP Imager + ISP Camera Camera Camera Connector Line Connector Line.203 ex) Air blower motor ex) Air blower motor ex) Air blower motor MIPI MIPI MIPI Connector Arrow Connector double arrow Connector Line.211 Connector Line.213 LIN LIN LIN Video Signal Video Signal Video Signal Connector Line.216 Connector double arrow.217 Connector Line.218 Connector Arrow.220 Connector double arrow.221 Control Control Control letf arrow.224 Connector Line.228 Connector Line.230 Sheet.231 Handle Angle Handle Angle HandleAngle Sheet.232 Gear Position Gear Position GearPosition Gear Position.167 Sheet.233 Wiper SW Wiper SW Wiper SW Sheet.173 Sheet.168 Sheet.169 Sheet.170 Sheet.171 Sheet.172 Connector Line.234 Connector Line.235 Connector Line.238 Connector Line.239 Connector Line.240 Sheet.242 Sheet.244 I2C 2 I2C I2C Twisted Pair Cable Twisted Pair Cable Twisted Pair Cable (Video & I2C) (Video & I2C) (Video & I2C) I2C 1 I2C I2C Sheet.255 Sheet.347 Handle Angle .342 Handle Angle Handle Angle Handle Angle Handle Angle

Camera PMIC

Multi-Channel Power Management ICs (PMICs)

AHL Tx

Video Decoders/Encoders

MCU

RH850 Automotive MCUs
RL78 Low-Power 8 & 16-Bit MCUs

LDO

Linear Regulators (LDO)

LDO

Linear Regulators (LDO)

MCU

RH850 Automotive MCUs
RL78 Low-Power 8 & 16-Bit MCUs

AHL Rx

Video Decoders/Encoders

Buck Regulator

Buck Controllers (External FETs)