step increase in supply voltage may result in a system reset.

[victor zheng]

Hi Team

There is below statement in the spec of nRF52832. Customer want to know if there is only a spike in their VDD，Is there still a risk of this problem occurring？

The amplitude of spike is over 300mV, but the width is very narrow (<2ms). 

Regards

Victor

[Simonr]

Hi Victor

Since this note is only specific to the Power On Reset, this will only be relevant during power-on. So if the voltage drops or spikes by more than 300mV within operational limits this should not be a concern. If the spike you're customer is talking about brings the device outside of operating voltage or if it occurs during power-on reset it may indeed trigger a reset. This can also happen with large enough spikes/drops within operating voltages.

Best regards,

Simon

[victor zheng]

Hi Simonr

How to define " during power-on". After the VDD exceed 1.7V, but it is still in the process of ramp up. If there is a spike at this time, does it will cause reset? 

Regards

Victor

[Simonr]

Hi

Can you provide some details on this spike exactly? How large is it, and is it an upwards spike or a downwards drop in voltage? The 300mV stated in the PS is very conservative and 300mV isn't likely to happen in normal operating condition, but is more likely to occur at extreme temperatures and supply voltages, but the POR can happen, also during operation, so my last reply wasn't entirely correct, sorry about that.

Best regards,

Simon

[victor zheng]

Hi Simon

No more detail information from customer yet. Thank you for your help.

Regards

Victor