What can the PG pin of CH221K be used for?

韵湖葱白

What can the PG pin of CH221K be used for? [Copy link]

 

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@USB MCU

The specification says PG, Power Good, low level is valid, and the function can be customized.

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Is there any example for this custom functionality?

Can it be used to make an indicator light?

hailiuhengli

The chip pin is an open-drain output, which means that an external 3.3V pull-up resistor is required. When the chip requests a gear that meets the requirements, it will output a low level to inform the user. In theory, an indicator light can be connected.

韵湖葱白

hailiuhengli posted on 2022-9-13 13:46 The chip pin is an open-drain output, which means that an external 3.3V pull-up resistor is required. When the chip requests a gear that meets the requirements, it will output a low level to inform the user...

Got it, thanks