Status
Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
NMIEX | LVL1EX | LVL0EX | |||||
AccessR | R | R | |||||
Reset0 | 0 | 0 |
Non-Maskable Interrupt Executing
Level 1 Interrupt Executing
Level 0 Interrupt Executing
This flag is set when a priority level 0 interrupt is executing, or when the interrupt handler has been interrupted by a priority level 1 interrupt or an NMI. The flag is cleared when returning (RETI) from the interrupt handler.