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Interface circuit

A technology of interface circuit and coding circuit, applied in the field of bus interface circuit, can solve problems such as high chip area requirements

Pending Publication Date: 2019-09-24
INFINEON TECH AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of additional electrically isolated components for the transmission of these signals results in a relatively high chip area requirement for the integrated bus interface circuit

Method used

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Examples

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Embodiment Construction

[0023] The examples described here relate to bus interface circuits for CAN bus systems. It should be understood that the approach described here can also be easily applied to other bus systems, such as LIN, Flexary or Process Field Bus. Therefore, the ensuing description is not limited to CAN bus systems. It should also be noted that the approach described here can be used not only in the automotive sector but also in other industrial applications.

[0024] figure 1 A general example of a bus node is shown with a microcontroller 10 and a bus interface circuit 20 (bus interface for short) for the CAN bus (bus line 30 ). It should be understood that the examples described are simplified illustrations containing only those elements that are necessary for the ensuing illustrations. The microcontroller 10 processes both the data transmitted via the bus and the data received by the bus, wherein the data is transmitted as a serial data stream with a protocol corresponding to the ...

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Abstract

A method for a bus interface circuit is described. According to one exemplary embodiment, the method comprises coding a first data stream by assigning first symbols to falling and rising edges of the first data stream, and coding a further data stream by assigning second symbols to the edges or levels of said further data stream. A symbol sequence is constructed from the first symbols and second symbols, wherein said symbol sequence is constructed in such a manner that the first symbols are always delayed by the same value relative to the associated edges of the first data stream. The method also comprises transmitting the symbol sequence via a galvanically isolating component, and decoding the symbol sequence transmitted via the galvanically isolating component in order to reconstruct the first data stream and the further data stream.

Description

technical field [0001] This disclosure relates to the field of data buses, in particular bus interface circuits for serial buses. Background technique [0002] Data buses are used for digital communication between two or more electronic devices. Devices coupled to a bus are often identified as bus nodes. In general, the expression "bus" usually designates a communication system which includes both the specification of the bus hardware and the communication protocol according to which the bus nodes communicate. Numerous data buses are standardized, with different bus standards predominating in different fields of industry. CAN (Controller Area Network), LIN (Local Interchange Network) and FlexRay are frequently used, for example, in the automotive industry (but also in other areas of industrial use). The mentioned examples are from the fieldbus category. [0003] If data transmission between bus nodes in different supply voltage domains (for example 12V / 48V in automotive ...

Claims

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Application Information

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IPC IPC(8): G06F13/40G06F13/42H04L12/40
CPCG06F13/4068G06F13/4282H04L12/40006H04L2012/40215H04L25/0266H04L25/493H04L25/4917H04L7/042
Inventor M·曼戈斯特T·欣德雷E·皮赫特
Owner INFINEON TECH AG
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