micropython/ports/esp32/boards/ESP32_GENERIC_C3/board.md

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The following files are firmware images that should work on most ESP32-C3-based boards with 4MiB of flash, including WROOM and MINI modules, that use the revision 3 silicon (or newer).

USB serial/JTAG support is enabled on pin 18 and 19. Note that this is not a full USB stack, the C3 just provides a CDC/ACM class serial and JTAG interface.