Information

Table 45-70. Message buffer code for Rx buffers (continued)
CODE
Description
Rx Code BEFORE
receive New
Frame
SRV
1
Rx Code AFTER
successful
reception
2
RRS
3
Comment
0b0110:
OVERRUN - MB is
being overwritten
into a full buffer.
OVERRUN Yes FULL - If the CODE field
indicates
OVERRUN and
CPU has serviced
the MB, when a
new frame is
moved to the MB,
the code returns to
FULL.
No OVERRUN - If the CODE field
already indicates
OVERRUN, and
another new frame
must be moved, the
MB will be
overwritten again,
and the code will
remain OVERRUN.
See Matching
process for details
about overrun
behavior.
0b1010:
RANSWER
4
- A
frame was
configured to
recognize a
Remote Request
Frame and transmit
a Response Frame
in return.
RANSWER - TANSWER(0b1110
)
0 A Remote Answer
was configured to
recognize a remote
request frame
received, after that
a MB is set to
transmit a response
frame. The code is
automatically
changed to
TANSWER
(0b1110). See
Matching process
for details. If
CTRL2[RRS] is
negated, transmit a
response frame
whenever a remote
request frame with
the same ID is
received.
- - 1 This code is
ignored during
matching and
arbitration process.
See Matching
process for details.
Table continues on the next page...
Memory map/register definition
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
1142
Preliminary
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