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CAN transceiver

A transceiver and CAN bus technology, applied in the protection of internal/peripheral computer components, transmission systems, electrical components, etc.

Pending Publication Date: 2022-03-01
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, malicious devices may attempt to manipulate bus control even after losing arbitration

Method used

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  • CAN transceiver
  • CAN transceiver
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Embodiment Construction

[0017] Many well-known manufacturing steps, components, and connectors have been omitted or have not been described in detail in the description so as not to obscure the present disclosure.

[0018] It will be readily appreciated that the components of the embodiments as generally described herein and illustrated in the drawings may be arranged and designed in a variety of different configurations. Accordingly, the following more detailed description of various embodiments as represented in the accompanying drawings is not intended to limit the scope of the present disclosure, but merely represents various embodiments. While various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0019] The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the inventions. The described embodiments are to be considered in all respects ...

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PUM

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Abstract

A transceiver for transmitting and receiving data from a controller area network (CAN) bus is disclosed. The transceiver includes a microcontroller port, a transmitter, and a receiver, wherein the transceiver is configured to determine a bit timing from a data frame received by the receiver. The transceiver is further configured to detect an attempt to introduce signal glitches in a predetermined portion of the data frame, and after detecting the signal glitches, the transceiver is configured to fail the data frame on a transmit line and / or to deactivate the transmitter for a predetermined period of time.

Description

Background technique [0001] Controller Area Network (CAN bus) is a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other's applications without a host computer. CAN is a message-based protocol that uses two wires to enable multiple devices to communicate with each other and is used in many types of applications including automotive applications. For each message, the data in the data packet is transmitted sequentially, but in such a way that if more than one device is transmitting at the same time, only the highest priority message can continue, while the other devices stop transmitting their messages. This process is called "arbitration" and is used by all sending devices, and the device attempting to send the highest priority message wins the arbitration. The transmitted data packet is received by all devices, including the transmitting device that received its own message. However, even after losing arbitration, a malicious dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04L12/413H04L43/16H04L1/00H04L1/16H04L1/18
CPCH04L12/40H04L12/40084H04L12/4135H04L43/16H04L1/0083H04L1/004H04L1/1607H04L1/18H04L2012/40215H04L12/40169G06F1/14G06F21/85H04B1/40H04L7/033H04L12/40163H04L2012/40273
Inventor 罗尔夫·范德伯吉特弗朗西斯科斯·J·克罗斯特斯
Owner NXP BV