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reheating a faultly GPIO pin/keeping chip off for long time makes it work again?

Question asked by dhirajp15 on Mar 20, 2017
Latest reply on Mar 21, 2017 by Clive One

Hi ST support,

I have made a custom PCB using stm32L152v8t6 , there are four copies and I have flashed same code in all four boards. There are 6 gpio input pins which are initially pulled up.So after keeping the device on for some time the voltage across some gpio pins drop down. If I keep the device off for some time or reheat the faulty pins it starts working. Why am I facing such a weird issue ?We are moving on to production and want to solve this issue as soon as possible.The problem is observed in two boards while other two are working.

Please Help ASAP,