FlexCAN
Freescale Semiconductor
30-14
MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
IPSBAR
Offset:
0x1C_0020 (ERRSTAT)
Access: User read/write
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R BIT1
ERR
BIT0
ERR
ACK
ERR
CRC
ERR
FRM
ERR
STF
ERR
TX
WRN
RX
WRN
IDLE
TXRX
FLT
CONF
0
BOFF
INT
ERR
INT
0
W
w1c
w1c
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 30-9. FlexCAN Error and Status Register (ERRSTAT)
Table 30-8. ERRSTAT Field Descriptions
Field
Description
31–16
Reserved, must be cleared.
15
BIT1ERR
Bit1 error. Indicates inconsistency between the transmitted and received bit in a message.
0 No transmit bit error
1 At least one bit sent as recessive was received as dominant
Note: The transmit bit error field is not modified during the arbitration field or the ACK slot bit time of a message,
or by a transmitter that detects dominant bits while sending a passive error frame.
14
BIT0ERR
Bit0 error. Indicates inconsistency between the transmitted and received bit in a message.
0 No transmit bit error
1 At least one bit sent as dominant was received as recessive
13
ACKERR
Acknowledge error. Indicates whether an acknowledgment has been correctly received for a transmitted message.
0 No ACK error was detected since the last read of this register.
1 An ACK error was detected since the last read of this register.
12
CRCERR
Cyclic redundancy check error. Indicates whether or not a CRC error has been detected by the receiver.
0 No CRC error was detected since the last read of this register.
1 A CRC error was detected since the last read of this register.
11
FRMERR
Message form error. 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.
0 No form error was detected since the last read of this register.
1 A form error was detected since the last read of this register.
10
STFERR
Bit stuff error.
0 No bit stuffing error was detected since the last read of this register.
1 A bit stuffing error was detected since the last read of this register.
9
TXWRN
Transmit error status flag. Reflects the status of the FlexCAN transmit error counter.
0 Transmit error counter
<
96
1 TXErrCounter
≥
96
8
RXWRN
Receiver error status flag. Reflects the status of the FlexCAN receive error counter.
0 Receive error counter
<
96
1 RxErrCounter
≥
96
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
