PY32F030
from
安価なARMCortex-M0+マイコンPY32
PY32F030F28P6TU
https://www.lcsc.com/product-detail/Microcontroller-Units-MCUs-MPUs-SOCs_PUYA-PY32F030F28P6TU_C3018716.html
LCSCで$0.53
ROM 64k
RAM 8k
GPIO 18
PY32