PXD10RM Datasheet, PDF (694/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Table 18-12. Error and Status Register (ESR) field descriptions (continued)
Field
Description
BIT0_ERR
ACK_ERR
CRC_ERR
FRM_ERR
STF_ERR
TX_WRN
RX_WRN
IDLE
TXRX
FLT_CONF
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
Current FlexCAN status (transmitting/receiving)
This bit indicates if FlexCAN is transmitting or receiving a message when the CAN bus is not in IDLE
state. This bit has no meaning when IDLE is asserted.
1 = FlexCAN is transmitting a message (IDLE=0)
0 = FlexCAN is receiving a message (IDLE=0)
Fault Confinement State
This 2-bit field indicates the Confinement State of the FlexCAN module, as shown in Table 18-13. If
the LOM bit in the Control Register is asserted, the FLT_CONF field will indicate “Error Passive”.
Since the Control Register is not affected by soft reset, the FLT_CONF field will not be affected by
soft reset if the LOM bit is asserted.
18-24
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor