Multiplexing and Data Communications Integrated Circuits for Automotive In-Vehicle Networks (Special Issue on ASICs for Automotive Electronics)

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This paper describes our recent developments of ASICs for automotive multiplexing and data communications to implement in-vehicle networks. With the advancement of automotive electronics, there are ever growing needs for invehicle networks. One need is associated with solving the problem of an increasing number of electrical signal wires that inevitably accompany the increasing applications of automotive electronics. Another kind of need is concerned with sharing vehicle control data among several electronic control units such as engine, brake, suspension, and steering electronic control units to achieve an integrated vehicle control system for the purpose of obtaining higher performances in vehicle dynamics. In order to reduce the number of signal wires and share the control data, in-vehicle networks based on multiplexing and data communications are required. In this paper, two original communication protocols are presented to respectively cover low-and high-speed multiplexing and data communications that are two most needed communication speed areas in our present and future automobiles. ASICs for the presented communication protocols were designed and fabricated, using 2 μm CMOS process. They have the chip size of 3.2 mm×2.7 mm with 5,000 transistors and 6.9 mm×4.9 mm with 18,000 transistors respectively for low- and high-speed multiplexing and data communications. An elaborate bus driver / receiver ASIC required for high-speed multiplexing and data communications was also designed and fabricated, using 35 V DC bipolar process. As one of its distinctive features, it can greatly suppress radio frequency noise radiated from a communication bus. It has the chip size of 4.8 mm×3.8 mm that contains 570 device elements. The features of the protocols are given in detail with the descriptions of the developed ASICs.
社団法人電子情報通信学会の論文
1993-12-25

Multiplexing and Data Communications Integrated Circuits for Automotive In-Vehicle Networks (Special Issue on ASICs for Automotive Electronics)

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