Current spike from sleep mode to using twi

RE: Current spike from sleep mode to using twi

Jared — Fri, 14 Feb 2020 14:49:15 GMT

Hi,

Using the DC/DC regulator should decrease the current consumption of the CPU compared to using the LDO. Could you update the case with the result from the development kit? Could you share the designs files of your custom board if the issue won't reproduce on the development kit? I can make the case private if you prefer it.

regards

Jared

RE: Current spike from sleep mode to using twi

corentind — Thu, 13 Feb 2020 18:53:45 GMT

Hi Jared,

Thanks for your help.

I would need a bit more time to reproduce the issue on a development kit.
We are not using the DC/DC regulator. What is the implication of enabling the DC/DC regulator?
I attached a screenshot with higher resolution

How can I start the HF clock?

RE: Current spike from sleep mode to using twi

Jared — Thu, 13 Feb 2020 08:53:01 GMT

Hi,

The TWI peripheral should only consume about 1 mA current when it's active (transmitting).

Are you able to replicate the current on a development kit? Could you provide a minimal project that will reproduce the current and will run on the development kit and doesn't require a specific TWI slave.
Are you using the DC/DC regulator?
Could you try to capture with trigger level set to 10 mA so that we get a better resolution.
Do you start the HF clock before you enable the TWI peripheral?

regards

Jared