ATSAMC21N18A has two CAN modules
that performs communication according to ISO11898-1 (Bosch CAN specification 2.0 part
A,B) and Bosch CAN FD specification V1.0.
CAN 0 and CAN 1 are connected to two on-board ATA6561 CAN physical-layer transceivers. Table 1 and Table 2 show the connections between the ATSAMC21N18A and two ATA6561 transceivers.
The CAN differential signals are connected to two 1 x 2, 100 mil pin-headerw
labeled CAN 0 and CAN 1.
Table 1. CAN 0 Transceiver (ATA6561)
Connections
| SAMC21Npin |
Function |
ATA6561 function |
Shared functionality |
| PA24 |
CAN0 TX |
TXD |
- |
| PA25 |
CAN0 RX |
RXD |
- |
Table 2. CAN 1 Transceiver (ATA6561)
Connections
| SAMC21Npin |
Function |
ATA6561 function |
Shared functionality |
| PB14 |
CAN1 TX |
TXD |
- |
| PB15 |
CAN1 RX |
RXD |
- |
Table 3. CAN Header (CAN 0)
| CAN header pin |
Function |
| 1 |
CANH0 |
| 2 |
CANL0 |
Table 4. CAN Header (CAN 1)
| CAN header pin |
Function |
| 1 |
CANH1 |
| 2 |
CANL1 |