interrupt nesting in 8951

[hr1212s]

what happen if controller executing interrupt subroutine and another interrupt is arrived?
new interrupt may be higher,lower priority or same interrupt.

should controller automatically disables all interrupt at start of interrupt execution?

 

[BurnOut_tesla]

No need to disable the interrupt..
If ur controller is already executing an ISR, at that time if another interrupt is reported then if that interrupt is of higher priority then program control will shifted to new ISR...
if that second interrupt is of same or lower priority then first ISR will get complete then second will be executed....