System off draws more then 80µA

RE: System off draws more then 80µA

AmbystomaLabs — Mon, 22 Jan 2018 23:17:27 GMT

And this references another good example of doing power off with the SD: devzone.nordicsemi.com/.../

RE: System off draws more then 80µA

AmbystomaLabs — Mon, 22 Jan 2018 23:02:52 GMT

This example shows power off when not using SD. Not unexpectedly, when using the SD it is preferred to use the API instead of disabling and writing to the power register as you did. In the download on this link they failed to add .zip to the attachment. devzone.nordicsemi.com/.../

RE: System off draws more then 80µA

AmbystomaLabs — Mon, 22 Jan 2018 22:56:28 GMT

This should prove useful: devzone.nordicsemi.com/.../

RE: System off draws more then 80µA

AmbystomaLabs — Mon, 22 Jan 2018 22:31:56 GMT

It is a popular topic. Here are the blog entries on it: devzone.nordicsemi.com/.../

RE: System off draws more then 80µA

AmbystomaLabs — Mon, 22 Jan 2018 22:30:57 GMT

Ok. Don't worry about it. Sometimes the blog engine is a little flaky. Off hand that seems like a really messy way to do a system power off. I personally haven't had to do a system power off since just disabling the ble and doing a power manage gives you about 2 microamps of power consumption. Which is pretty small.

I would suggest you search in the blogs for info on this. There are two approaches. 1. you call the api sd_power_system_off 2. You write to the register as you did.

To make your code a little easier on yourself, you might consider writing FF's to the outclear register and a similar process to config to make them inputs. Actually you only need to make them inputs to stop the power loss, so your choice. Clearing all the individual gpio using the driver would seem maddening.

Then just init your wakeup pin and once you come out of system off do a re-init of all the gpio.

Based on the current consumption, I would guess that the HF clock isn't powering down.

RE: System off draws more then 80µA

ruetten — Mon, 22 Jan 2018 22:20:21 GMT

I have testet the code button, converting to UTF-8 to ANSI the result is what you can see now ... It seems to be a bug in the blog software ....

RE: System off draws more then 80µA

ruetten — Mon, 22 Jan 2018 22:09:33 GMT

The preview seems to be OK I don't know what is going wrong withe text ...

RE: System off draws more then 80µA

AmbystomaLabs — Mon, 22 Jan 2018 21:52:33 GMT

Two things:

Please clean up your posting so the code is readable. You need to select all the code and click the little code button.
Post a schematic of your device. You know people are going to ask for it. Might as well get it over with. If there is an IP concern then you will have to do private posting to Nordic team.