STM32F411Cx/401Cx minimum system + J-LINK debugger

The STM32F411/401 microcontrollers belong to the STM32 Dynamic Efficiency™ family. These devices are the entry-level products of the high-performance F4 series, with main frequencies up to 100/84MHz. They also have rich peripherals, DSP instructions and floating-point units to expand the application range of the products. (The 401CC dismantled by POS has somewhere to use)

characteristic:

• The downloader and core board are powered independently, making them easy to use separately.
• The onboard J-LINK OB based on STM32F103T8 supports downloading, programming and online debugging.
• Using the USB TYPEC interface makes it more convenient to use.
• Onboard is a user LED, two user buttons (with hardware debounce), and two voltage dividers, which can be quickly embedded into a design prototype.

user's guidance:

1. Correctly solder the upper part of JLINK components according to the schematic diagram and PCB except for the microcontroller. Note that R7 is not soldered and should be left blank.
2. After powering on, measure whether the USB voltage is 5v and whether the LDO outputs 3.3v.
3. Weld on the F103T8 microcontroller
4. Power on. If it is not burned, connect another xxlink programmer to the upper right corner of the board and burn the JLINKOB.bin in the attachment.
5. Plug and unplug the USB and check whether JLINK has been recognized in the device manager.
6. Continue to solder the following parts of the soldering guide as shown below

Example project: Adjustable speed breathing light KEY1 accelerates, KEY2 decelerates