Final answer:
The question addresses the role of an interrupt service routine (ISR) in embedded systems, where it responds to a hardware interrupt by incrementing a counter each time a data pixel is ready. This is relevant in fields like digital image processing, highlighting the importance of real-time data handling in technology.
Step-by-step explanation:
The question pertains to an interrupt service routine (ISR) which is a feature used in computers and technology, particularly in the field of embedded systems. An ISR is triggered by hardware interrupts to perform a task—here, the task is to increment a counter each time a pixel of data is ready to be read, which ensures that the system keeps track of the number of pixels processed. This concept is fundamental in digital image processing and embedded programming where efficiency and real-time processing are crucial.
Options Analysis:
- Option 1: ISR incrementation is the correct action being described as it relates to the ISR incrementing a value upon data readiness.
- Option 2: Pixel reading is involved, but it isn't the focus of the ISR's action.
- Option 3: Data readiness triggers the action, but the question asks about the ISR's response to this condition.
- Option 4: No action mentioned does not apply since there is a clear action that the ISR performs.