Question

Explain Non-maskable Interrupts.

Answer 1

• These interrupts cannot be disabled or masked by the processor.
• A non-maskable interrupt overrides and disables all maskable interrupts.
• They are used for emergency situations such as power failure, smoke detection, or parity check errors.
• Non-maskable interrupts have higher priority than maskable interrupts.
• They are always vectored interrupts.
• The response time for non-maskable interrupts is very fast.