Hard Synchronization to be performed at every EDGE from recessive-to-dominant edge during Bus Idle. Additionally, Hard Synchronization is required for each received SOF bit. An SOF bit can be received both during Bus Idle, and also during Suspend Transmission and at the END of Interframe Space. Any node disables Hard Synchronization if it SAMPLES an edge from recessive to dominant or if it starts to send the dominant SOF bit.

Two types of synchronization are supported:

• Hard synchronization is done with a falling edge on the bus while the bus is idle, which is interpreted as a Start of frame (SOF). It restarts the INTERNAL Bit Time Logic.
• Soft synchronization is used to lengthen or shorten a bit time while a CAN frame is received.

Hard Synchronization to be performed at every edge from recessive-to-dominant edge during Bus Idle. Additionally, Hard Synchronization is required for each received SOF bit. An SOF bit can be received both during Bus Idle, and also during Suspend Transmission and at the end of Interframe Space. Any node disables Hard Synchronization if it samples an edge from recessive to dominant or if it starts to send the dominant SOF bit.

Two types of synchronization are supported: