Hardware interrupts were introduced as an optimization, eliminating unproductive waiting time in polling loops, waiting for external events. The first system to use this approach… See more

Each interrupt signal input is designed to be triggered by either a logic signal level or a particular signal edge (level transition). Level-sensitive inputs continuously … See more

Interrupts may be fully handled in hardware by the CPU, or may be handled by both the CPU and another component such as a programmable interrupt controller See more

Interrupts are commonly used to service hardware timers, transfer data to and from storage (e.g., disk I/O) and communication interfaces (e.g., UART, Ethernet), handle keyboard and … See more

Interrupt signals may be issued in response to hardware or software events. These are classified as hardware interrupts or software interrupts, respectively. For … See more

The processor samples the interrupt trigger signals or interrupt register during each instruction cycle, and will process the highest priority enabled… See more

Interrupts provide low overhead and good latency at low load, but degrade significantly at high interrupt rate unless care is taken to … See more