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STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

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Controller area network (bxCAN)<br />

RM0008<br />

Figure 205. CAN frames<br />

Inter-Frame Space<br />

Arbitration Field<br />

32<br />

Data Frame (St<strong>and</strong>ard identifier)<br />

44 + 8 * N<br />

Ctrl Field<br />

6<br />

Data Field<br />

8 * N<br />

CRC Field<br />

16<br />

Ack Field<br />

2<br />

Inter-Frame Space<br />

or Overload Frame<br />

7<br />

ID DLC CRC<br />

EOF<br />

SOF<br />

Inter-Frame Space<br />

RTR<br />

IDE<br />

r0<br />

Data Frame (Extended Identifier)<br />

64 + 8 * N<br />

ACK<br />

Inter-Frame Space<br />

or Overload Frame<br />

Arbitration Field<br />

32<br />

Arbitration Field Ctrl Field<br />

32<br />

6<br />

Data Field<br />

8 * N<br />

CRC Field<br />

16<br />

Ack Field<br />

2<br />

7<br />

ID DLC CRC<br />

EOF<br />

Inter-Frame Space<br />

Arbitration Field<br />

32<br />

Remote Frame<br />

44<br />

Ctrl Field<br />

6<br />

CRC Field<br />

16<br />

Ack Field<br />

2<br />

7<br />

ID<br />

DLC<br />

CRC<br />

SOF<br />

RTR<br />

IDE<br />

r0<br />

Inter-Frame Space<br />

or Overload Frame<br />

EOF<br />

ACK<br />

SOF<br />

SRR<br />

IDE<br />

RTR<br />

r1<br />

r0<br />

ACK<br />

Data Frame or<br />

Remote Frame<br />

Error<br />

Flag<br />

6<br />

Any Frame Inter-Frame Space<br />

Suspend<br />

Intermission<br />

Transmission<br />

Bus Idle<br />

3<br />

8<br />

Inter-Frame Space<br />

Error Frame<br />

or Overload Frame<br />

Flag Echo Error Delimiter<br />

6 8<br />

End Of Frame or<br />

Error Delimiter or<br />

Overload Delimiter Overload Frame<br />

Overload Overload Overload<br />

Flag Echo Delimiter<br />

6 6 8<br />

Data Frame or<br />

Remote Frame<br />

Inter-Frame Space<br />

or Error Frame<br />

Notes:<br />

0

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