Now I've made a board using 52833 and downloaded the 's140_nrf52_7.0.1_softdevice', 'bootloader', 'settings' into 52833.
I use SD_POWER_DCDC_MODE_SET() to enable DCDC in my application. But now the system seems to be resetting all the time and is not working properly.
Because in my code, if the function is enabled correctly and returns 0, it will make my green LED steady on. If it returns 1 it will make my red LED steady on.
This is my code:
Now when I use JLink's four lines (VDD,GND,SWDIO,SWDCLK) to download whole project.
An abnormal board: The green LED on the board can be steady on, which means that the SD_POWER_DCDC_MODE_SET() has returned 0, but when I turned the power off and turned it back on, the LED started flashing, as if the system was resetting. Sometimes the abnormal board will keep red LED on.
A normal board: Always keep the green LED on, even after power off and re-power on.
I did a cross-test, swapping the chips from the normal board with the chips from the abnormal board. The test phenomenon is accompanied by chip movement.
So I wonder if there's something wrong with the chip.
Can you provide me with the failure analysis?
We can provide abnormal boards and abnormal chips, if there is any other need, please let us know.
This is my hardware schematic:
Regards,
Wei
