Figure 669. Extended Message Id Filter Path - ST STM32G4 Series Reference Manual

RM0440
Extended message ID filtering
Figure 669
Extended Message ID filter element is described in
Controlled by the Global Filter Configuration RXGFC and the Extended ID Filter
Configuration
Identifier Extension bit (IDE) of received frames are compared against the list of configured
filter elements.
The Extended ID AND Mask (XIDAM) is AND-ed with the received identifier before the filter
list is executed.
shows the flow for extended Message ID (29-bit Identifier) filtering. The
Message ID, Remote Transmission Request bit (RTR), and the
RXGFC

Figure 669. Extended Message ID filter path

29-bit
Remote frame
No
Receive filter list enabled
RXGFC[LSE[3:0]] > 0
Match filter
element #0
No
No
Match filter
element #RXGFC.LSE
No
Accept
non-matching
frames
RM0440 Rev 1
FD controller area network (FDCAN)
Section
Valid frame received
11-bit
Bit identifier
Yes
Reject remote frame
RXGFC[RRFE] = 0
Yes
Yes
Yes
RXGFC[ANFE[1]] = 1
RXGFC[ANFE[1]] = 0
Target FIFO full
Append to target FIFO
43.3.9.
Reject
Acceptance
or Rejection
Accept
Discard frame
Yes
No
MS47280V1
1919/2083
1965