Bit Stuffing in CAN | NRZ Coding in CAN | Stuff Error | Bit Stuffing | NRZ Coding

CAN bus utilizes Non-Return-to-Zero (NRZ) coding, specifically high-level (recessive) for logic '1' and low-level (dominant) for logic '0', where the voltage remains constant during the bit interval. It enables efficient, high-speed communication by mapping bits directly to signal levels, requiring bit stuffing after five consecutive identical bits to maintain synchronization. Key Characteristics & Challenges Efficiency: NRZ is highly bandwidth-efficient compared to self-clocking codes like Manchester, as it requires only one signal transition per bit at most. Lack of Self-Clocking: Because there are no transitions between identical bits, the receiver can lose synchronization (clock drift) during long strings of 0s or 1s. The "Bit Stuffing" Solution: To fix the synchronization issue, CAN uses Bit Stuffing. After five consecutive bits of the same polarity, the transmitter automatically inserts a "stuff bit" of the opposite polarity to force a transition, allowing the receiver to re-synchronize its clock. If you have any questions please write to us email: [email protected], [email protected] for courses related to Embedded System, Automotive and RTOS contact : 8073162262 #BitStuffing #bitstuffinginCAN #NRZ #NRZCoding #CAN #CANProtocol #ControllerAreaNetwork #CANBus #automotiveelectronics #AutomotiveCommunication #DifferentialSignaling #BitstuffinginCANprotocol #ErrorDetection