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Overview
Navigation
Live Capture
Cursors
Importing
Exporting
Decoder Setup
Analysis
Automated Test
Specifications

FlexRay:
Overview
Static Frame
Dynamic Frame
Wakeup
Startup
Physical Layer
Compare to CAN and LIN

CAN Bus:
Overview
Data Frame
Extended Frame
Remote Frame
Error Frame
Bit Stuffing
Physical Layers
Single Wire CAN
Compare to LIN and FlexRay

LIN Bus:
Overview
LIN Frame
LIN Header
LIN Slave Part
LIN Errors
Compare to CAN and FlexRay

Other Buses:
Overview
UART: Kline, J1708, and RS232
J1850
SPI
12C

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WaveBPS: CAN Bus Overview

CAN Bus is the dominant protocol for networking electronics in vehicles. It features a bit rate up to 1 Mbit and offers simple networking of microcontrollers with the help of dedicated CAN bus silicon called a CAN Controller.
 
The data transfer message of CAN is the data frame. This data frame is allowed to have a longer ID and is then called an extended data frame.
 
Used in some applications but not in automotive is the remote frame. The remote frame allows a node to request a particular CAN ID.
 
CAN is very robust. This means it can not only detect many errors but can take action such as automatic transmission or node shut down.
 
CAN uses the bit stream to resyncronize the receivers to the transmitter. In order for this to work with specific bit sequences CAN must use bit stuffing. Bit stuffing makes decoding a CAN waveform on a traditional oscilloscope difficult.
 
CAN is a data link layer. To signal CAN electrically there are three common physical layers in use.
In some applications where CAN is used FlexRay or LIN may provide advantages.
 
Picture
A CAN Bus Data Frame.
Click to download the CAN Bus specification and literature from Bosch.
株式会社日本イントリピッドコントロールシステムズ / Intrepid Control Systems Japan, KK 電話番号 +81 (0)3-5937-1523  ファックス +81 (0)3-5937-1524
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