Is it okay to connect a 25v wire on an A0 pin to The STM32F072RB Dev board?

[JS.4]

While testing the data line, I have connected a wire to an A0 pin which gives 25v on full throttle signal. After dumping the code can't get any output as expected and found few registers were heating up.

[waclawek.jan]

> Is it okay to connect a 25v wire on an A0 pin to The STM32F072RB Dev board?

No.

JW

[TDK]

The Absolute Maximum Values for pins are listed in the datasheet. In most cases, 5V is the max. In some cases, 3.3V (or operating voltage) is the max.

[Uwe Bonnes]

An 5 V on 5-Volt tolerant pins is also only allowed on a powered device!