CAN FD v2.0
20
PG223 December 5, 2018
Chapter 2:
Product Specification
4
ACKER
0
ACK Error.
Indicates an acknowledgment error.
• 1 = Indicates an acknowledgment error has occurred.
• 0 = Indicates an acknowledgment error has not occurred on the bus
after the last write to this bit.
If this bit is set, writing a 1 clears it.
3
BERR
0
Bit Error.
Indicates the received bit is not the same as the transmitted
bit during bus communication.
• 1 = Indicates a bit error has occurred.
• 0 = Indicates a bit error has not occurred on the bus after the last write
to this bit.
If this bit is set, writing a 1 clears it.
2
STER
0
Stuff Error.
Indicates an error if there is a stuffing violation.
• 1 = Indicates a stuff error has occurred.
• 0 = Indicates a stuff error has not occurred on the bus after the last
write to this bit.
If this bit is set, writing a 1 clears it.
1
FMER
0
Form Error.
Indicates an error in one of the fixed form fields in the message frame.
• 1 = Indicates a form error has occurred.
• 0 = Indicates a form error has not occurred on the bus after the last
write to this bit.
If this bit is set, writing a 1 clears it.
0
CRCER
0
CRC Error
Indicates a CRC error has occurred.
• 1 = Indicates a CRC error has occurred.
• 0 = Indicates a CRC error has not occurred on the bus after the last
write to this bit.
If this bit is set, writing a 1 clears it.
Notes:
1. In transmitter delay compensation phase, any error is reported as fast bit error (by the transmitter).
2. Fixed stuff bit errors are reported as form error.
3. In case of a CRC Error and a CRC delimiter corruption, only the FMER bit is set.
Table 2-10:
Error Status Register
(Cont’d)
Bits
Name
Default
Value
Description