STM32F051K8T6 IC doesn't show the diode value across the Vdd and Vss pins. It shows OL in the multimeter display.

AKuma.22 · ‎2020-12-03

Peter BENSCH · ‎2020-12-03

There is no diode across VDD and VSS, but there are so called parasitic diodes at the GPIOs. But these parasitic diodes arise as a by-product during production of the die and must not be used as a diode.

Please explain your expectations, maybe we can sort that out.

/Peter

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TDK · ‎2020-12-03

FWIW, on my STM32F4 disco board, my multimeter shows 0.378V when connected between GND and VDD. I assume it's grabbing the voltage protection diode voltage.

I agree it's an odd measurement to make.

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