Control A

Name:
CTRLA
Offset:
0x00
Reset:
0x00
Access:
Configuration Change Protection
Bit76543210
IVSELCVTLVL0RR
AccessR/WR/WR/W
Reset000

Bit 6 – IVSEL: Interrupt Vector Select

Interrupt Vector Select

If boot section is defined, it will be placed before 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.

ValueDescription
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

Compact Vector Table

This bit is protected by the Configuration Change Protection mechanism.

ValueDescription
0 Compact Vector Table function is disabled
1 Compact Vector Table function is enabled

Bit 0 – LVL0RR: Round-Robin Priority Enable

Round-Robin Priority Enable

This bit is not protected by the Configuration Change Protection mechanism.
ValueDescription
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.