Robust differential bus used in vehicles and industrial systems.
CAN uses differential signalling with arbitration by message ID, up to 1 Mbit/s (CAN FD faster), CRC and automatic retransmission. Terminated by 120 Ω at both ends. Robust in noisy vehicles and factories; higher layers include CANopen and J1939.
Engine ECU and ABS exchange data over CAN.
CAN is robust against noise and supports reliable communication in cars and factories, where many nodes share one network.
Robust differential bus used in vehicles and industrial systems.
CAN is robust against noise and supports reliable communication in cars and factories, where many nodes share one network.
It uses differential signalling, error detection and an arbitration scheme that lets the highest-priority message get through without loss.
One megabit per second over a short bus, with the speed reducing as the bus length increases.
Typical applications include connecting the engine controller and the dashboard in a vehicle, building an industrial sensor network that must survive electrical noise and sending priority messages in a machine network with arbitration.
Study "I2C" first (topic 66 of 104 in Electronics & Embedded). It covers the groundwork this topic builds on.
Priority via lower ID wins. Bus-off error handling. Message-based not address-based.
Engine ECU and ABS exchange data over CAN.
The next topic is "USB basics", which builds directly on this one.
It is classed as Intermediate in Electronics & Embedded (topic 67 of 104). It is an intermediate topic. Work through the beginner topics in Electronics & Embedded first.
Want to practise? Open the interactive course for quick checks, quizzes, simulations and progress tracking.