Embedded 101: RP2040 Pin Multiplexing Explained
This article defines pin multiplexing and explains how RP2040 GPIOs switch between different peripheral functions via function selection tables.
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Project description
【Preliminary Note】The original hardware example in this article was written based on the RP2040. The actual hardware used in this hands-on demonstration features the W55RP20 as the main controller chip. The circuit logic and UF2 flashing operation principles are universally applicable, with only the main controller model differing. The original chip model mentioned in the circuit descriptions below is provided for reference purposes only. Pin function to reuse Put simply, pin multiplexing means "one GPIO pin can serve multiple roles" — for example, a single GPIO pin can function as an…
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