STM32F401/ STM32F411 Development Board, 84/100MHz, Arduino and MicroPython Support

TM32F401CCU6 core board V3.0 Freq. 84Mhz ROM:256KB RAM:64KB STM32F411CEU6 core board V3.0 Freq. 100MHZ ROM:512KB RAM:128KB 25MHZ high speed crystal oscillator & 32.768Khz 6PF low speed crystal oscillator V3.0 version began to use lead-free process, the pin header is gold-plated pin header, more environmentally friendly Flash pads have been reserved and USBDisk && FATFFS routines are provided Support MicroPython programming, provide available MicroPython firmware, see the link for configuration files, but do not provide technical answers! Support Arduino programming, see Github for details Boards with version V1.3 and above have 3 buttons, reset button, BOOT0 button, and user buttons. How to enter ISP mode Method 1: Press and hold the BOOT0 button and the reset button under the power-on state, then release the reset button, and release the BOOT0 button after 0.5 seconds Method 2: Hold down the BOOT0 key when power is off, and release the BOOT0 key 0.5S after power on DFU mode: just use the data cable to connect to the computer, if there is a problem of unrecognized, you can properly heat the chip (25 ° C), and then re-enter the ISP mode Serial port mode: use USB to serial port to connect PA9 and PA10 of the core board Software: STM32CubeProg. How to enter HID Bootloader after writing to APP Press and hold the KEY button, click the reset button, LED C13 flashes, release the KEY button to enter