Figure 668. Standard Message Id Filter Path - ST STM32G4 Series Reference Manual

FD controller area network (FDCAN)
Standard message ID filtering
Figure 668
Message ID filter element is described in
Controlled by the Global Filter Configuration (RXGFC) Message ID, Remote Transmission
Request bit (RTR), and the Identifier Extension bit (IDE) of received frames are compared
against the list of configured filter elements.
1918/2083
shows the flow for standard Message ID (11-bit Identifier) filtering. The Standard

Figure 668. Standard Message ID filter path

11-bit
Remote frame
No
Receive filter list enabled
RXGFC[LSS[7:0]] > 0
Match filter
element #0
No
No
Match filter
element #RXGFC.LSS
No
Accept
non-matching
frames
RM0440 Rev 1
Section 43.3.8.
Valid frame received
29-bit
Bit identifier
Yes
Reject remote frame
RXGFC[RRFS] = 0
Yes
Yes
Yes
RXGFC[ANFS[1]] = 1
RXGFC[ANFS[1]] = 0
Target FIFO full
Append to target FIFO
Reject
Acceptance
or Rejection
Accept
Discard frame
Yes
No
RM0440
MS47279V1