Can 5 V tolerant pin be turned off?

Posted on May 30, 2017 at 11:26

Hi,

I am using the NUCLEO - L053R8 circuit board.

I question about 5 V tolerant function.

A pull-up resistor driven by 5 V is added to the port of PA_8.

In this case, when setting the open drain setting, 0.1 mA flows.

However, setting to input setting is 0 mA.

I want to set the current to 0 mA in the open drain setting state.

question 1

In the open drain setting, does the protection diode work?

Question 2

Please check if my open drain setting method is correct.

It is set with mbed.

///////////////////////////////////////////

&sharpinclude ''mbed.h''

DigitalInOut Common_5(PA_8);

int main() {

while(1) {

Common_5.mode(OpenDrain);

wait_ms(2);

}

}

///////////////////////////////////////////

Thanks

#gpio #mbed #nucleo-l053r8 #5v-tolerant