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IOsetting / py32f0-template

Puya PY32F002A PY32F003 PY32F030 GNU GCC SDK, template and examples
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Does PY32Fxx series support True Open Drain? #8

Open llinjupt opened 1 year ago

llinjupt commented 1 year ago

Hi IOsetting.

I wonder if PY32Fxx series support True Open Drain when with 3V3 supply like STM8S does. I have read the datasheet and nothing about 5VFT. It seems that you are so familiar with this series. Would you like to confirm if it's supported. Thanks in advance.

IOsetting commented 1 year ago

Hi llinjupt,

I got no technical support from Puya so I cannot give a definite answer. According to the voltage limits described in 表 5-1 电压特性 in the datasheet, if the numbers are true, these pins are not true open drain, and they are not 5V tolerant when the power supply is 3.3V.

llinjupt commented 1 year ago

@IOsetting Thanks. Arrording to the table, the maximum input voltage is VCC+0.3, so no pin is 5V tolerant when with 3V3 supply.