
CANx_ESR1 field descriptions (continued)
Field
Description
14
BIT0ERR
Bit0 Error
This bit indicates when an inconsistency occurs between the transmitted and the received bit in a
message.
0
No such occurrence.
1
At least one bit sent as dominant is received as recessive.
13
ACKERR
Acknowledge Error
This bit indicates that an Acknowledge Error has been detected by the transmitter node, that is, a
dominant bit has not been detected during the ACK SLOT.
0
No such occurrence.
1
An ACK error occurred since last read of this register.
12
CRCERR
Cyclic Redundancy Check Error
This bit indicates that a CRC Error has been detected by the receiver node, that is, the calculated CRC is
different from the received.
0
No such occurrence.
1
A CRC error occurred since last read of this register.
11
FRMERR
Form Error
This bit indicates that a Form Error has been detected by the receiver node, that is, a fixed-form bit field
contains at least one illegal bit.
0
No such occurrence.
1
A Form Error occurred since last read of this register.
10
STFERR
Stuffing Error
This bit indicates that a Stuffing Error has been detected by the receiver node.
0
No such occurrence.
1
A Stuffing Error occurred since last read of this register.
9
TXWRN
TX Error Warning
This bit indicates when repetitive errors are occurring during message transmission and is affected by the
value of TXERRCNT in CAN_ECR register only. This bit is not updated during Freeze mode.
0
No such occurrence.
1
TXERRCNT is greater than or equal to 96.
8
RXWRN
Rx Error Warning
This bit indicates when repetitive errors are occurring during message reception and is affected by the
value of RXERRCNT in CAN_ECR register only. This bit is not updated during Freeze mode.
0
No such occurrence.
1
RXERRCNT is greater than or equal to 96.
7
IDLE
This bit indicates when CAN bus is in IDLE state. See the table in the overall CAN_ESR1 register
description.
0
No such occurrence.
1
CAN bus is now IDLE.
Table continues on the next page...
Memory map/register definition
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
1410
NXP Semiconductors
Summary of Contents for KE1xF Series
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