14.5.1 Control A
| Name: | CTRLA |
| Offset: | 0x00 |
| Reset: | 0x00 |
| Property: | Configuration Change Protection |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| IVSEL | CVT | LVL0RR | |||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 0 | 0 | 0 |
Bit 6 – IVSEL Interrupt Vector Select
If the boot section is defined, it will be placed before the application section. The actual start address of the application section is determined by the BOOTEND fuse.
This bit is protected by the Configuration Change Protection mechanism.
| Value | Description |
|---|---|
| 0 | Interrupt vectors are placed at the start of the application section of the Flash |
| 1 | Interrupt vectors are placed at the start of the boot section of the Flash |
Bit 5 – CVT Compact Vector Table
This bit is protected by the Configuration Change Protection mechanism.
| Value | Description |
|---|---|
| 0 | Compact Vector Table function is disabled |
| 1 | Compact Vector Table function is enabled |
Bit 0 – LVL0RR Round Robin Priority Enable
| Value | Description |
|---|---|
| 0 | Priority is fixed for priority level 0 interrupt requests: The lowest interrupt vector address has highest priority. |
| 1 | Round Robin priority scheme is enabled for priority level 0 interrupt requests |