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The program cannot be programmed using ULINK. After pressing the DEBUG key, the voltage of the reset pin of the microcontroller changes from 3.3V to 2.8V. I do not know why.

MCU
12월 17, 2020 by Gabriel 1621

Related circuit diagrams.

Can you analyze the logic of this schematic diagram? In the end, why can't I burn the program and perform simulation? How can the reset pin voltage of the MCU change from 3.3V to 2.8V?

T1X{3X5~[JR9PK0{73UKFFP.png

모든 댓글

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Savannah 게시 날짜 December 17, 2020

It feels different

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Luis 게시 날짜 December 17, 2020

Do you have analog ground and digital ground in your circuit?

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  • Gabriel

    Gabriel 게시 날짜 December 17, 2020

    This program upgrades and burns the circuit, and the reset circuit shares the ground. The analog ground is in another circuit.

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Luis 게시 날짜 December 17, 2020

If this is the case, will there be a voltage drop between the two power sources.

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Carlos 게시 날짜 December 17, 2020

If there is no problem with the circuit, the voltage will be reduced when the power supply is insufficient, which means that the load exceeds the capacity of the power supply.

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