https://devzone.nordicsemi.com/f/nordic-q-a/22172/51822-uart-framing-break-issuesHi for some reason I cannot connect any PC terminal to my custom board: I would get consistent NRF_UART0-&gt;ERRORSRC = 0x000c or 0x0004 indicating break and/or framing issue. I hope someone has any hints to help me out ... Here is my setup: en-USTelligent Community 13Fri, 19 May 2017 06:30:20 GMThttps://devzone.nordicsemi.com/thread/87159?ContentTypeID=1Fri, 19 May 2017 06:30:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8a5def52-f13f-49c6-898c-e7c7643189dbjeremie<p>arggg ... rings a bell, now that you say that; for some reason I repressed this part. thanks a lot Turbo J !</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/87158?ContentTypeID=1Thu, 18 May 2017 18:25:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c9ab004c-e527-45e8-8be2-35e24a4607dbTurbo J<p>You need to use a converter like MAX3232 to convert from the high voltage RS232 signals (up to +-15V!) to the UARTs 3.3 Volts on the NRF chip.</p> <p>Note that the high RS232 voltages can fry the NRF chip rather quickly - never connect these directly to microcontroller pins.</p><div style="clear:both;"></div>