Hello,
I am developing a circuit which is based on nRF52820. I got the boards manufactured but they are not functioning properly for some reason.
Following are the errors which i am getting.
1- The BLE is not advertising properly.
2- If i blink the LED with delay of 800ms, it blinks at an interval of about 2.8ms.
3- I am not able to program the chip most of the times using SWD.
So following could be the causes of malfunction.
1- I am powering the system using a USB power source (May be my design has some flaws)
2- The 32MHz external crystal might be selected wrong part.
3- May be i am missing something on the software side to run the chip properly based on USB power input.
Please assist me if i am doing anything wrong.
Thank you
Following are my schematics. (One from the datasheet which i copied and one is my own)
