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schematic for CH552 download adapter? #2

Closed charkster closed 2 years ago

charkster commented 2 years ago

Do you have a schematic for the CH552 download adapter? I can't order one from kadenken.com Will it work for the Tang Nano? Thank you.

charkster commented 2 years ago

I put a 22k ohm resistor from the Tang Nano 3.3V pin to the USB D+ pin and was able to program the CH552 on the Tang Nano. I did not need to make 3.3V from the USB's 5V because the Tang Nano has a 3.3V regulator from the USB's 5V.

sohtamei commented 2 years ago

Thanks for your report, so much ! Just FYI, The shecmatic of adapter is following, schematics

charkster commented 2 years ago

@sohtamei I will try these values to see if they program the Tang Nano. Thanks for the schematic.