ATSAMC21J18A 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.
CAN0 is connected to an on-board ATA6561 CAN physical-layer transceiver. Table 1 shows connections between the ATSAMC21J18A and the ATA6561.
The CAN differential signals are connected to a 1 x 2, 100 mil pin-header labeled CAN.
| SAM C21pin | Function | ATA6561 function | Shared functionality |
|---|---|---|---|
| PA24 | CAN0TX | TXD | - |
| PA25 | CAN0RX | RXD | - |
| CAN header pin | Function |
|---|---|
| 1 | CANH |
| 2 | CANL |