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L9803 データシート(PDF) 77 Page - STMicroelectronics |
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L9803 データシート(HTML) 77 Page - STMicroelectronics |
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77 / 126 page  L9803 On-Chip Peripherals 77/126 Figure 38. CAN Frames Modes of Operation The CAN Core unit assumes one of the seven states described below: ● STANDBY. Standby mode is entered either on a chip reset or on resetting the RUN bit in the Control/Status Register (CSR). Any on-going transmission or reception operation is not interrupted and completes normally before the Bit Time Logic and the clock prescaler are turned off for minimum power consumption. This state is signalled by the Data Field 8 * N Control Field 6 Arbitration Field 12 CRC Field 16 Ack Field 7 ID DLC CRC Data Frame 44 + 8 * N Arbitration Field 12 ID DLC Remote Frame 44 CRC Field 16 7 CRC Control Field 6 Overload Flag 6 Overload Delimiter 8 Overload Frame Error Flag 6 Error Delimiter 8 Error Frame Flag Echo ≤ 6 Bus Idle Inter-Frame Space Suspend 8 Intermission 3 Transmission 2 2 Inter-Frame Space or Overload Frame Inter-Frame Space Inter-Frame Space or Overload Frame Inter-Frame Space Inter-Frame Space or Overload Frame Data Frame or Remote Frame Notes: • 0 <= N <= 8 • SOF = Start Of Frame • ID = Identifier • RTR = Remote Transmission Request • IDE = Identifier Extension Bit • r0 = Reserved Bit • DLC = Data Length Code • CRC = Cyclic Redundancy Code • Error flag: 6 dominant bits if node is error active else 6 recessive bits. • Suspend transmission: applies to error passive nodes only. • EOF = End of Frame • ACK = Acknowledge bit Data Frame or Remote Frame Any Frame Inter-Frame Space or Error Frame End Of Frame or Error Delimiter or Overload Delimiter Ack Field End Of Frame EOF |
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