TRAP is a non-maskable interrupt with the highest priority in a microcontroller. It consists of both level and edge triggering and is used to address exceptional conditions or faults that require immediate attention at the kernel level. TRAP must remain high until it is acknowledged, as edge-triggered interrupts trigger when the signal goes high and remains high, while level-triggered interrupts activate when the signal is continuously held at a logic high value. While other interrupts can be masked by resetting the microprocessor, this particular type of interrupt cannot be stopped, meaning it will always halt execution when detected by the processor.