Integrated circuit for coupling a microcontrolled control apparatus to a two-wire bus

US6115831A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Peter Hanf · Göppingen, DE
• Jurgen Minuth · Eislingen/Fils, DE
• Jurgen Setzer · Mühlacker, DE

Key dates

• Filing date: Mar 26, 1997
• Grant date: Sep 5, 2000
• Expiry date: Mar 26, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2012/40215
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

An integrated semiconductor circuit for an electronic control unit has a microcontroller with a bus protocol function for communicating with other microcontrolled control units via a Controller Area Network (CAN) by way of a two-wire bus. The invention includes a bus-fault-tolerant transceive function which permits communication even when a bus fault is present. A bus fault recognition and response device disconnects the bus from its normal connections and alters its termination characteristics when a fault is detected.