11.3.1 Bus Initiator Priority
The bus initiators are assigned a priority. If multiple initiators address the same target simultaneously, the initiator with the highest priority wins the arbitration. The priority is as follows:
| Initiator/Target | Priority |
|---|---|
| CPU Load/Store | 1 (highest) |
| CPU Instruction Fetch | 2 |
| UPDI | 3 |
| CRC Scan | 4 (lowest) |