As shown in the figure below, it is a reference circuit for 56 in SF32 Series Serial Port Auto-Download Design - SiFli-Wiki v1.0 Documentation.
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Shouldn’t the reference voltage of the Mode pin be VDDIO2? Is it inappropriate to directly connect it to 3.3V here?
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The input of MT9700 has no input power supply. Should it be connected to the PVDD power supply here?
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If the power supply of VDDIO4 is 1.8V, should the VIO of CH343P be connected to 1.8V?
