https://www.cnx-software.com/2022/07/04/geehy-apm32f103-clone-of-stm32f103-mcu-has-been-tested-to-work-without-pcb-or-code-modifications/?amp=1
Geehy APM32F103 clone of STM32F103 MCU has been tested to work without PCB or code modifications -...
Jan 21, 2026 - Geehy APM32F103 is a clone of STMicro STM32F103 MCU that has been tested by at least one person who claims it was just a drop-in replacement and PCB,
https://www.st.com/content/st_com/en/products/microcontrollers-microprocessors/stm32-32-bit-arm-cortex-mcus/stm32-mainstream-mcus/stm32f1-series/stm32f103.html
STM32F103 - Arm Cortex-M3 Microcontrollers (MCU) 72 MHz - STMicroelectronics
STM32F103 microcontrollers use the Cortex-M3 core, with a maximum CPU speed of 72 MHz. Its portfolio covers from 16 Kbytes to 1 Mbyte of Flash with motor...
arm cortex m3stm32f103microcontrollersmcu72
https://www.cnx-software.com/2022/11/21/air32f103-is-a-clone-of-stm32f103-clocked-at-up-to-216-mhz/
Air32F103 is a clone of STM32F103 clocked at up to 216 MHz - CNX Software
Nov 21, 2022 - Air32F103 is yet another clone of the STM32F103 microcontroller that can be faster if needed with a clock of up to 216 MHz instead of 72 MHz for the