MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -Non-Maskable Interrupts are those which cannot be disabled or ignored by microprocessors. TRAP is a non-maskable interrupt. It consists of both level as well as edge triggering and is used in critical power failure conditions.

Detailed explanation-2: -In computing, a non-maskable interrupt (NMI) is a hardware interrupt that standard interrupt-masking techniques in the system cannot ignore. It typically occurs to signal attention for non-recoverable hardware errors. Some NMIs may be masked, but only by using proprietary methods specific to the particular NMI.

Detailed explanation-3: -TRAP of 8086 is an example of Non Maskable interrupt.

Detailed explanation-4: -Non-Maskable interrupt − In this type of interrupt, we cannot disable the interrupt by writing some instructions into the program. For example: TRAP. Software interrupt − In this type of interrupt, the programmer has to add the instructions into the program to execute the interrupt.

Detailed explanation-5: -A trap is a synchronous interrupt triggered by an exception in a user process to execute functionality. Exception conditions like invalid memory access, division by zero, or a breakpoint can trigger a trap in an OS. A trap changes the mode of an OS to a kernel routine.