StLinkV2.1 has a new serial port indicator light, the diode is anti-reverse connection, and the power pin is pulled out. Compared with the USB interface, the Microusb is more convenient to use by extending the wire. PS. There may be a design problem. The diode voltage drop causes the power supply to be only 2.9v. It is best to remove the diode and replace it with a fuse. Now the latest stlink firmware cannot be downloaded to c8t6. The capacity is too small and needs to be replaced with cbt6! ! ! !
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