Information

Table 45-73. Rx FIFO structure (continued)
0xE0 ID Filter Table Element 0
0xE4 ID Filter Table Element 1
0xE8
to
0x2D4
ID Filter Table Elements 2 to 125
0x2D8 ID Filter Table Element 126
0x2DC ID Filter Table Element 127
= Unimplemented or Reserved
Each ID Filter Table Element occupies an entire 32-bit word and can be compound by
one, two, or four Identifier Acceptance Filters (IDAF) depending on the MCR[IDAM]
field setting. The following figures show the IDAF indexation.
The following figures show the three different formats of the ID table elements. Note that
all elements of the table must have the same format. See Rx FIFO for more information.
Table 45-74. ID table structure
Format 31 30 29 24 23 16 15 14 13 8 7 1 0
A RTR IDE
RXIDA
(Standard = 29-19, Extended = 29-1)
B RTR IDE
RXIDB_0
(Standard = 29-19, Extended = 29-16)
RTR IDE
RXIDB_1
(Standard = 13-3, Extended = 13-0)
C
RXIDC_0
(Std/Ext = 31-24)
RXIDC_1
(Std/Ext = 23-16)
RXIDC_2
(Std/Ext = 15-8)
RXIDC_3
(Std/Ext = 7-0)
= Unimplemented or Reserved
RTR — Remote Frame
This bit specifies if Remote Frames are accepted into the FIFO if they match the target
ID.
1 = Remote Frames can be accepted and data frames are rejected
0 = Remote Frames are rejected and data frames can be accepted
IDE — Extended Frame
Specifies whether extended or standard frames are accepted into the FIFO if they match
the target ID.
1 = Extended frames can be accepted and standard frames are rejected
Chapter 45 CAN (FlexCAN)
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
Freescale Semiconductor, Inc.
Preliminary
1147
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