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| Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
| can_fd [2014/05/21 18:57] – can4linux CAN FD heinz | can_fd [2014/09/30 21:11] – heinz | ||
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| - | ===== CAN with flexible Data Rate | + | ====== CAN with flexible Data Rate improved CAN ======= |
| More than 20 years after introducing CAN, communication requirements have increased and CAN has reached it's bandwidth limits in some application fields. | More than 20 years after introducing CAN, communication requirements have increased and CAN has reached it's bandwidth limits in some application fields. | ||
| - | To improve CAN regarding bandwith Bosch has specified the **improved CAN** data link layer protocol, called **CAN FD**. The idea behind CAN FD is that after the arbitration phase of classic CAN the data rate can be increased. The data bits are transferred with a higher bit rate than in the arbitration phase when a transmitter has won the bus arbitration. The speed is limited only by the CAN transceiver signal delay and the signal delay on the cable. \\ Besides the increased bit speed the new CAN FD allows date frames up to 64 bytes compared with the maximum of 8 bytes with classic CAN. | + | To improve CAN regarding bandwith Bosch has specified the **improved CAN** data link layer protocol, called **CAN FD**. The idea behind CAN FD is that after the arbitration phase of classic CAN the data rate can be increased. The data bits are transferred with a higher bit rate than in the arbitration phase when a transmitter has won the bus arbitration. The speed is limited only by the CAN transceiver signal delay and the signal delay on the cable. \\ Besides the increased bit speed the new CAN FD allows date frames up to 64 bytes compared with the maximum of 8 bytes with **classic CAN**. |
| The ISO TC22 SC3 WG1 is currently working to integrate CAN FD in the ISO 11898-1 standard as an optional feature. | The ISO TC22 SC3 WG1 is currently working to integrate CAN FD in the ISO 11898-1 standard as an optional feature. | ||
