Datasheet

Figure 49-5. Standard Message ID Filter Path
receive filter list enabled
valid frame received
11 / 29 bit identifier
remote frame
11 bit
reject remote frames
discard frame
match filter element #0
match filter element #MCAN_SIDFC.LSS
yes
no
accept non-matching frames
acceptance / rejection
accept
reject
MCAN_SIDFC.LSS[7:0] > 0
MCAN_GFC.ANFS
[1] = ‘0’
MCAN_GFC.RRFS = ‘1’
MCAN_GFC.RRFS = ‘0’
29 bit
MCAN_SIDFC.LSS[7:0] = 0
MCAN.GFC.ANFS[1] = ‘1’
no
yes
no
yes
yes
FIFO selected and
target FIFO full (blocking)
no
store frame
Extended Message ID Filtering
The figure below shows the flow for extended Message ID (29-bit Identifier) filtering. The Extended Message ID Filter
element is described in 49.5.7.6 Extended Message ID Filter Element.
Controlled by MCAN_GFC and MCAN_XIDFC Message ID, Remote T
ransmission Request bit (RTR), and the
Identifier Extension bit (IDE) of received frames are compared against the list of configured filter elements.
MCAN_XIDAM is ANDed with the received identifier before the filter list is executed.
SAM E70/S70/V70/V71 Family
Controller Area Network (MCAN)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 1414