37.2 Rx Buffer and FIFO Element 1
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | R1 |
| Offset: | 0x004 |
| Reset: | 0x00000000 |
| Property: | RW |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| ANMF | FIDX[6:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| FDF | BRS | DLC[3:0] | |||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | |||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| RXTS[15:8] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| RXTS[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Bit 31 – ANMF Accepted Non-matching Frame
Acceptance of non-matching frames may be enabled via GFC.ANFS and GFC.ANFE
| Value | Description |
|---|---|
| 0 |
Received frame matching filter index FIDX. |
| 1 |
Received frame did not match any Rx filter element. |
Bits 30:24 – FIDX[6:0] Filter Index
0-127 : Index of matching Rx acceptance filter element (invalid if ANMF = ‘1’)
Note: Range is 0 to SIDFC.LSS-1 for
standard and 0 to XIDFC.LSE-1 for extended.
Bit 21 – FDF FD Format
| Value | Description |
|---|---|
| 0 |
Standard frame format. |
| 1 |
CAN FD frame format (new DLC-coding and CRC). |
Bit 20 – BRS Bit Rate Search
| Value | Description |
|---|---|
| 0 |
Frame received without bit rate switching. |
| 1 |
Frame received with bit rate switching. |
Bits 19:16 – DLC[3:0] Data Length Code
| Value | Description |
|---|---|
| 0-8 |
CAN + CAN FD: received frame has 0-8 data bytes |
| 9-15 |
CAN: received frame has 8 data bytes. |
| 9-15 |
CAN FD: received frame has 12/16/20/24/32/48/64 data bytes |
Bits 15:0 – RXTS[15:0] Rx Timestamp
Timestamp Counter value captured on start of frame reception. Resolution depending on configuration of the Timestamp Counter Prescaler TSCC.TCP