K60P100M100SF2RM Datasheet, PDF (1346/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Memory Map/Register Definition
CANx_RXIMRn field descriptions (continued)
Field
Description
For Rx FIFO ID Filter Table elements, see the RXFGMASK register description.
0 The corresponding bit in the filter is "don't care."
1 The corresponding bit in the filter is checked.
48.3.56 Message Buffer Structure
The Message Buffer structure used by the FlexCAN module is represented in the
following figure. Both Extended and Standard Frames (29-bit Identifier and 11-bit
Identifier, respectively) used in the CAN specification (Version 2.0 Part B) are
represented. Each individual MB is formed by 16 bytes.
The memory area from 0x80 to 0x47C is used by the Mailboxes.
Table 48-108. Message Buffer Structure
31
30 29 28 27 24 23 22 21 20 19 18 17 16 15
87
0
0x0
CODE
SR
R
IDE
RT
R
DLC
TIME STAMP
0x4
PRIO
ID (Standard/Extended)
ID (Extended)
0x8
Data Byte 0
0xC
Data Byte 4
Data Byte 1
Data Byte 5
Data Byte 2
Data Byte 6
Data Byte 3
Data Byte 7
= Unimplemented or Reserved
CODE — Message Buffer Code
This 4-bit field can be accessed (read or write) by the CPU and by the FlexCAN module
itself, as part of the message buffer matching and arbitration process. The encoding is
shown in Table 48-109 and Table 48-110. See Functional Description for additional
information.
Table 48-109. Message Buffer Code for Rx buffers
CODE
Description
Rx Code BEFORE
receive New
Frame
SRV¹
Rx Code AFTER
successful
reception²
RRS³
0b0000:
INACTIVE
-
-
-
INACTIVE- MB is
not active.
Comment
MB does not
participate in the
matching process.
Table continues on the next page...
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K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.