Pin Mapping

Pin mapping is the process of defining and documenting which physical pins on a microcontroller, development board, or integrated circuit correspond to specific functions, GPIO numbers, or software references. It establishes the relationship between hardware pin numbers, their designated functions (like digital I/O, analog inputs, PWM, SPI, etc.), and how they are referenced in code. Pin mapping is essential for programming embedded systems, as it allows developers to correctly connect external components and write software that controls the right physical pins. Most development platforms provide pin mapping diagrams or charts that show both the physical pin layout and their corresponding software identifiers.