The board did not reserve a 5V external interface during design. The 5V was directly powered by Typ-C. The later programming process used a USB to TTL serial port burner and could only connect to the 12V reserved external interface, resulting in secondary development procedures in the later stage. Burning failed. There is currently insufficient funds to purchase the vc-02 official JTAG debugger, so I purchased a new vc-02 chip and will update the display video after the program is successfully burned later.
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