Parsed the pin-definition tables out of both datasheets - Table 2-1-1 (CH32L103,
C8T6 column) and Table 2 (STM32F103, LQFP48 column) - and diffed them pin by
pin. Zero mismatches, including OSC_IN/OSC_OUT, NRST, PA11/PA12 for USB,
PA13/PA14 for SWD, and BOOT0. Power pins differ only in naming.
This was the one unverified assumption the whole project rested on: three
boards laid out to a footprint that has to accept either MCU. It holds.
Full table recorded in Documents/pinout-L103-vs-F103.md.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
