STMicroelectronics STM32F405 User Manual

Controller area network (bxCAN) RM0090
1086/1731 DocID018909 Rev 11
Figure 347. CAN frames
32.8 bxCAN interrupts
Four interrupt vectors are dedicated to bxCAN. Each interrupt source can be independently
enabled or disabled by means of the CAN Interrupt Enable Register (CAN_IER).
Data Frame or
Remote Frame
Data Field
8 * N
Ctrl Field
6
Arbitration Field
32
CRC Field
16
Ack Field
7
SOF
ID
DLC
CRC
Data Frame (Standard identifier)
44 + 8 * N
Arbitration Field
32
RTR
IDE
r0
SOF
ID
DLC
Remote Frame
44
CRC Field
16
7
CRC
Ctrl Field
6
Overload
Overload Frame
Error
6
Error Delimiter
8
Error Frame
Flag Echo
6
Bus Idle
Inter-Frame Space
Suspend
8
Intermission
3
Transmission
ACK
ACK
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
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
Ctrl = Control
Data Frame or
Remote Frame
Any Frame
Inter-Frame Space
or Error Frame
End Of Frame or
Error Delimiter or
Overload Delimiter
Ack Field
EOF
RTR
IDE
r0
EOF
Data Field
8 * N
Ctrl Field
6
32
CRC Field
16
Ack Field
7
SOF
ID
DLC
CRC
Data Frame (Extended Identifier)
64 + 8 * N
ACK
2
Inter-Frame Space
or Overload Frame
Inter-Frame Space
SRR
IDE
EOF
RTR
r1
r0
32
6
Overload
8
6
Overload
Flag
Echo
Delimiter
Flag
ai15154
Arbitration Field Arbitration Field

STMicroelectronics STM32F405 Specifications

General

Brand	STMicroelectronics
Model	STM32F405
Category	Controller
Language	English