Specifications

Status Registers
10-30
Bit 7 BEF. Bit Error Flag
0 The CAN module was able to send and receive correctly.
1 The received bit does not match the transmitted bit outside of the
arbitration field; or during transmission of the arbitration field, a
dominant bit was sent but a recessive bit was received.
Bit 6 SA1. Stuck at dominant Error
0 The CAN module detected a recessive bit.
1 The SA1 bit is always 1 after a hardware or a software reset or a
bus-off condition. The CAN module did not detect a recessive bit.
Bit 5 CRCE. CRC Error
0 The CAN module did not receive a wrong CRC.
1 The CAN module received a wrong CRC.
Bit 4 SER. Stuff Error
0 No stuff bit error occurred.
1 The stuff bit rule was violated.
Bit 3 ACKE. Acknowledge Error
0 The CAN module received an acknowledge.
1 The CAN module did not receive an acknowledge.
Bit 2 BO. Bus Off Status
0 Normal operation.
1 There is an abnormal rate of error occurrences on the CAN bus. This
condition occurs when the transmit error counter TEC has reached
the limit of 256. While in bus-off status, no messages can be received
or transmitted. This state is only exited by clearing the CCR bit in the
Master Control Register (MCR) or if the
Auto Bus-On bit in the Master
Control Register is set. After leaving the bus-off state, the error
counters are cleared.
Bit 1 EP. Error Passive Status
0 The CAN module is not in error-passive mode.
1 The CAN module is in error-passive mode.
Bit 0 EW. Warning Status
0 The values of both error counters are less than 96.
1 At least one of the error counters reached the warning level of 96.