ISR Meaning and
Definition
-
ISR stands for "Interrupt Service Routine." It refers to a software routine or function that is designed to handle interrupts generated by hardware devices in a computer system. When an interrupt occurs, the central processing unit (CPU) suspends its current execution of instructions and transfers control to the ISR. The ISR then performs the necessary operations to handle the interrupt, such as reading data from an input device or writing data to an output device.
The primary purpose of an ISR is to respond to time-sensitive events in a timely and efficient manner. Interrupts can occur due to various reasons, such as user input, hardware failures, or the completion of a specific task. By using ISRs, computer systems can quickly and effectively handle these events without disrupting the normal flow of program execution.
ISRs are an essential component of operating systems and are typically written in low-level languages, such as assembly or C, to ensure their responsiveness and efficiency. They are often associated with device drivers, as these routines facilitate communication between the hardware devices and the operating system.
In summary, an ISR is a software routine that handles interrupts generated by hardware devices in a computer system. It allows for efficient and timely response to events without affecting the execution of other programs, making it an indispensable mechanism for the proper functioning of computer systems.
Common Misspellings for ISR
Infographic
Add the infographic to your website:
