I designed a board using a STM32L031F6P6 about 4 years ago, (April 2021). The design has been using the internal oscillator running at 16Mhz perfectly for years. Then this past summer all of a sudden the RS232 Uart stopped receiving data until I...
Thank you all for you input. At that time I designed the circuit, I did not know about not using internal oscillators when using rs232.. now I do :). The board itself is in a garage which sees some temperature swings , but I live in the NW, so not...
thanks for the replyI have never did measure oscillator frequency. (sad). For the past 4 years, the system has been stable, and the uart has been rock solid. The behavior I am seeing now is that on boot it will be totally fine , but after so...
