The Program Counter | Embedded systems Interview Question #shorts

The Program Counter (PC) is a crucial register in any embedded system or microcontroller. It holds the address of the next instruction that the CPU needs to execute.
Every time an instruction is completed, the Program Counter automatically updates to point to the next instruction in memory. This continuous process enables the execution cycle: Fetch → Decode → Execute.
Without the Program Counter, the CPU wouldn’t know what to do next, and the program flow would completely break. It also plays an important role in handling loops, function calls, and interrupts.
In simple terms, the Program Counter acts like a guide that keeps your program running step by step in the correct order.

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