SYSTEM OFF

[Bluesky]

Hi, I would like to ask how can i get the current consumption that was stated in the datasheet which is 0.7uA  and the value I get from the reading is about 8-9 uA. 

#include "boards.h"

/**
* @brief Function for application main entry.
*/
int main(void)
{
NRF_POWER->SYSTEMOFF = 1;
}
/** @} */

Is this the right code as mention above?? Do I need to do any configuration in the other part of the FW or HW?

I am using the example code from : nRF5_SDK_14.2.0_17b948a\examples\peripheral\template_project

Thanks for helping!

[Stian Røed Hafskjold]

Please add a loop after calling SYSTEMOFF

int main(void)
{
NRF_POWER->SYSTEMOFF = 1;

for(;;){__WFE();}
}

The chip consumes less than 1 uA in System OFF, so if you get 8-9uA there must be something wrong with your measurement setup.

[Bluesky]

Hi Stian,

Thanks for helping, my setup for measurement is just connect the current measurement device to my nrf 52832, it there any problem with it? as i can measurement others with this connection, so I think it should be some FM problems.

[Stian Røed Hafskjold]

What is your measurement device? What voltage are you using. And is the nRF52832 soldered on to a custom board or are you using a DK. And if you have a custom board, do you have any other external components on the board?

[Bluesky]

Yes, I am using a DK there are others sensors on top with it. Is this the reason that affect the current draw?

Thanks

[Stian Røed Hafskjold]

It's probably the reason. Please describe your measurement setup

[Bluesky]

I connect the current measurement device to the nrf52832. This is my measurement setup. Now, I get the current measurement as 1.7uA when I turn everything off. I am still can't get the 0.7uA as mention from datasheet.

[Stian Røed Hafskjold]

No, that is not your measurement setup. Your measurement setup is a description of the tools you use to measure, which measurement techniques your are using and how you connect the DUT to your measurement equipment.

Are you using a power analyzer?

Are you using an amperemeter or multimeter?

Are you using a scope with current probe?

Are you measuring voltage drop over resistor?

Are you using the power profiler kit?

Which hardware are you using for the chip? Is this a custom board? If so, please post schematics.

If you are using a development kit, please give me the name of the development kit and the version.

What type of power source are you using? USB, external voltage supply, battery? At which voltage are you powering the board?

Which external components have you connected to the board? Are these always powered? Are you able to measure current without these connected?

How do you connect your measurement device to the board? Which header are you using?

If using a Nordic DK, how did you prepare the board for current measurements? Did you cut any solder bridges? Did you follow the user guide on the infocenter?

I need some more info here, otherwise I'm not able to help you...

[Bluesky]

Dear Stian, 

Thanks for helping. I think I have solved the problem and thanks!

have a nice day:)