The "Drag-and-Drop" Magic of Flashing Firmware on Pico, Full Principle Analysis

UF2 (USB Flashing Format) developed by Microsoft is used for Raspberry Pi Pico firmware.

ruilixin6

Published July 27, 2026 · © MIT license (MIT)

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. Figure 1.9 BOOT Mode Selection Circuit This circuit comprises two key functional modules of the Pico: one is the BOOT mode selection circuit that controls…

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