PXS20RM Datasheet, PDF (624/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

FlexCAN Module
RWRN_INT — Rx Warning Interrupt Flag
If the WRN_EN bit in MCR is asserted, the RWRN_INT bit is set when the RX_WRN flag transition
from ‘0’ to ‘1’, meaning that the Rx error counters reached 96. If the corresponding mask bit in the
Control Register (RWRN_MSK) is set, an interrupt is generated to the CPU. This bit is cleared by
writing it to ‘1’. Writing ‘0’ has no effect.
1 = The Rx error counter transition from < 96 to  96
0 = No such occurrence
BIT1_ERR — Bit1 Error
This bit indicates when an inconsistency occurs between the transmitted and the received bit in a
message.
1 = At least one bit sent as recessive is received as dominant
0 = No such occurrence
NOTE
This bit is not set by a transmitter in case of arbitration field or ACK slot, or
in case of a node sending a passive error flag that detects dominant bits.
BIT0_ERR — Bit0 Error
This bit indicates when an inconsistency occurs between the transmitted and the received bit in a
message.
1 = At least one bit sent as dominant is received as recessive
0 = No such occurrence
ACK_ERR — Acknowledge Error
This bit indicates that an Acknowledge Error has been detected by the transmitter node, i.e., a dominant
bit has not been detected during the ACK SLOT.
1 = An ACK error occurred since last read of this register
0 = No such occurrence
CRC_ERR — Cyclic Redundancy Check Error
This bit indicates that a CRC Error has been detected by the receiver node, i.e., the calculated CRC is
different from the received.
1 = A CRC error occurred since last read of this register.
0 = No such occurrence
FRM_ERR — Form Error
This bit indicates that a Form Error has been detected by the receiver node, i.e., a fixed-form bit field
contains at least one illegal bit.
1 = A Form Error occurred since last read of this register
0 = No such occurrence
STF_ERR — Stuffing Error
This bit indicates that a Stuffing Error has been detected.
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PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor