L9803 STMicroelectronics, L9803 Datasheet - Page 77

• Manufacturer Part Number: L9803
• Description: Super Smart Power Motor Driver With 8-bit Mcu, Ram, Eeprom, Adc, Wdg, Timers, Pwm And H-bridge Driver
• Manufacturer: STMicroelectronics

L9803
Figure 38. CAN Frames
Modes of Operation
The CAN Core unit assumes one of the seven states described below:
●
Overload Delimiter
Error Delimiter or
End Of Frame or
Remote Frame
Data Frame or
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
Any Frame
Inter-Frame Space
Inter-Frame Space
Intermission
Overload Flag
Error Flag
3 Transmission
Arbitration Field
Arbitration Field
6
6
Overload Frame
Inter-Frame Space
Suspend
ID
ID
Flag Echo
12
12
Error Frame
8
Overload Delimiter
≤ 6
8
Control Field
Control Field
Error Delimiter
Bus Idle
Inter-Frame Space
or Error Frame
8
6
6
DLC
DLC
Remote Frame
Data Frame or
Remote Frame
or Overload Frame
Inter-Frame Space
Data Field
44
8 * N
Data Frame
44 + 8 * N
CRC Field
CRC
16
CRC Field
Ack Field
CRC
Notes:
• 0
• 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
• Suspend transmission: applies to error
• EOF = End of Frame
• ACK = Acknowledge bit
16
active else 6 recessive bits.
passive nodes only.
2
<= N
7
End Of Frame
Ack Field
On-Chip Peripherals
2
Inter-Frame Space
or Overload Frame
Inter-Frame Space
or Overload Frame
<= 8
EOF
7
77/126