PXD20RM Datasheet, PDF (790/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Table 20-12. Error and Status Register (ESR) Field Descriptions (continued)
Field
16
BIT1_ERR
Description
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
17
BIT0_ERR
18
ACK_ERR
19
CRC_ERR
20
FRM_ERR
21
STF_ERR
22
TX_WRN
23
RX_WRN
24
IDLE
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 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
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
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
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
Stuffing Error
This bit indicates that a Stuffing Error has been detected.
1 = A Stuffing Error occurred since last read of this register.
0 = No such occurrence.
TX Error Counter
This bit indicates when repetitive errors are occurring during message transmission.
1 = TX_Err_Counter  96
0 = No such occurrence
Rx Error Counter
This bit indicates when repetitive errors are occurring during message reception.
1 = Rx_Err_Counter 96
0 = No such occurrence
CAN bus IDLE state
This bit indicates when CAN bus is in IDLE state.
1 = CAN bus is now IDLE
0 = No such occurrence
20-24
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor