Specifications:

• Memory:
  • 512 Kbytes of Flash memory
  • 128 Kbytes of SRAM
  • SPI Flash (Optional）
• Clock and power supply:
  • 3.3V-5V power input, 3.3V LDO maximum output current 100mA
  • USB C interface is used, and a diode is serial to prevent power backflow
  • 25MHz 9PF high speed crystal oscillator
  • 32.768K 6PF low speed crystal oscillator
• Interface and Key:
  • USART x 3, I2C x 3, SPI x 5,USBFS x 1
  • ADC x 1(10),I2S x 5,CRC x 1,TIM x 8
  • 20 Pin 2.54mm pitch I/O interface x 2
  • 4 Pin 2.54mm pitch SW debug interface x 1
  • USB C (Type C) interface x 1
  • User keys Key (PA0) x 1
  • Reset key NRST x 1
  • Boot0 key x 1

How to enter ISP (serial port /USB download)

Method 1:

• Press Boot0 and NRST at the same time and release NRST. After 0.5s, release Boot0 and enter ISP mode

Method 2:

• In the power off state, press Boot0, power on, wait for 0.5s, release to enter ISP mode
• Serial port download: use USB to serial port to connect the core board PA9,PA10 can be, do not use USB port power supply
• USB download: use the data cable to connect to the computer, if there is no identification problem,The chip can be properly heated (25°C+),then re-entering ISP mode
• STM32CubeProg, Weact Studio Download Tool (see Github/WeActTC/MiniSTM32F4x1/Soft/)
• No USB to serial port, no debugger, no computer driver, just a Type-C data line can complete the firmware download
  • Burn HID IAP firmware (the factory program brushes in by default, which is a special test version)
  • Press the KEY KEY to power up or press the KEY to reset, LED C13 flashes, release the KEY to enter
  • Confirm APP firmware address is 0x8004000, interrupt address offset is 0x4000
  • Download it using

Github/WeActTC/MiniSTM32F4x1/Soft/WeAct_HID_FW_Bootloader/weact_hid_flash_xxx.exe