Automotive CXPI Communication Application Circuit B (Door Mirror Drive Board / CXPI Responder Node)

CXPI, a next‑generation automotive communication protocol, delivers low cost and high responsiveness to support efficient control of various in‑vehicle functions.
This reference design represents an example of a responder node for in-vehicle CXPI communication, implemented as a door mirror control board equipped with a CXPI interface.
The CXPI interface IC TB9033FTG is adopted, and in combination with a Motor Control Driver (MCD) and external MOSFETs, the design enables control of multiple motors integrated in the door mirror as well as the Blinker.

Board Appearance
Board Appearance
DF2B29FU DF2B29FU TB9033FTG SSM3K341R SSM3K341R TB9101FNG TB9054FTG

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Features

  • Supports next‑generation in‑vehicle communication protocol CXPI (ISO 20794‑2~4, ISO 14229‑8).
  • Equipped with a CXPI interface IC featuring 16‑channel GPIO, supporting PWM output, AD input switching, and various I/O control functions.
  • Uses two types of automotive motor drivers; by combining GPIO PWM and H/L control signals, up to three motors can be driven flexibly and with high precision.
  • Drives turn indicators efficiently using N‑channel MOSFETs controlled by GPIO PWM signals, enabling adjustable lighting patterns and brightness.
  • Outer dimensions: 100mm × 100mm

Specifications

Main Ics CXPI Interface IC TB9033FTG
Input Power Supply Voltage DC 7V to 16V (Typ. 12V)
Functional blocks CXPI communication circuit, Blinker drive circuit, Door mirror drive circuit, and Mirror angle adjustment circuit
Supported motors and Control methods Automotive Brushed DC Motor (PWM)

Design Documents

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Design Data

Provides circuit data that can be loaded into EDA tools, PCB layout data, and data used in PCB manufacturing. Available in formats from multiple tool vendors. You can freely edit it with your preferred tool.

*1:Actual PCB was designed on CR8000BD. The other files were made from CR8000BD file.

*2:The data was generated on CR8000BD.

Used Toshiba Items

Part Number Device Category Application Area – Qty Description
Network communication IC CXPI Communication Circuit・1 CXPI Interface H/W logic IC with configurable 16ch I/O
H-bridge driver for automobile Door Mirror Control Circuit・1 PWM type, dual channel H-bridge brushed DC motor driver for automotive, VQFN40
H switch motor driver for automobile Door Mirror Angle Adjustment Circuit・1 Automotive 2ch H-Bridge driver for DC Brushed Motor, SSOP24
Small Low ON resistance MOSFETs Blinker Drive Circuit・1 N-ch MOSFET, 60 V, 6.0 A, 0.036 Ω@10V, SOT-23F
ESD protection diode (bi-directional type) CXPI Communication Circuit・1 Bidirectional TVS Diode (ESD Protection Diode), +/-24 V, SOD-323(USC)

Related Documents

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