37.1 Rx Buffer and FIFO Element 0
| 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: | R0 |
| Offset: | 0x000 |
| Reset: | 0x00000000 |
| Property: | - |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| ESI | XTD | RTR | ID[28:24] | ||||||
| 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 | |
| ID[23:16] | |||||||||
| 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 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| ID[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 | |
| ID[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 – ESI Error State Indicator
| Value | Description |
|---|---|
| 0 |
Transmitting node is error active. |
| 1 |
Transmitting node is error passive. |
Bit 30 – XTD Extended Identifier
Signals to the Host whether the received frame has a standard or extended identifier
| Value | Description |
|---|---|
| 0 |
11-bit standard identifier. |
| 1 |
29-bit extended identifier |
Bit 29 – RTR Remote Transmission Request
Signals to the Host whether the received frame is a data frame or a remote frame.
Note: There are no remote frames in
CAN FD format. In case a CAN FD frame was received (EDL = ‘1’), bit RTR reflects
the state of the reserved bit r1.
| Value | Description |
|---|---|
| 0 |
Received frame is a data frame. |
| 1 |
Received frame is a remote frame. |
Bits 28:0 – ID[28:0] Identifier
Standard or extended identifier depending on bit XTD. A standard identifier is stored into ID[28:18].