Temperature sensor AD7410

[ShivImp]

Hi

I am using 4 x AD7410 in each TWI channel, using both TWI ports.  So, altogether 8 AD7410s.   ( I used the Adafruit breakout boards).

Initially I get the temperature readings correctly - used the Putty,    each time I manually reset the nRF52840DK.    The board is powered from my laptop's USB.  

22.37
22.50
23.00
22.50
23.00
22.62
23.00
23.25

After I  leave the DVK non-functional and  I reset it,  the board returns an error.  The same error appears  when I reset the nRF52840DK.  

app: ERROR 3 CNRF ERROR INTERNAL] at C: SDK 17 . 1.0 
pc at: ox00030CBF 
app: End of error report 

Could you provide any suggestions on identifying the root cause?

Thanks.

ShivImp

[ShivImp]

I have tested the same with a Toshiba laptop and a few Dell laptops.  There was no problem with the Toshiba.  But, with all the Dell laptops,  the nRF 52840DK boards seems to continuously reset. I checked the USB  power supply and its stable. The  current consumption is very low.  About 9 mA.  I wonder is this is the issue with the Nordic USB port J2 on the Nordic nRF52840DK.