Sleep Mode on 20736S

PhGi_2174146 · ‎Nov 19, 2014

Does not having P0 pulled high have any impact on the ability of the module to enter sleep mode? I have been told that it impacts deep sleep mode, but I can't determine if it that is the only impact. I have seen some mention of this on this site: Re: Questions sleep and deep sleep modes on BCM20737 but only in reference to deep sleep mode.

The reason I'm asking is that I'm not seeing the device enter sleep mode when looking at the current draw. I don't seem to get below 100 micro amps. The device is normally always connected or advertising so I need to make sure I can sleep whenever possible to conserve battery life. I'm trying to rule P0 out as a potential issue.

Also, is there any correlation to the fine timer interval and battery life (e.g. shorter intervals leading to more power consumption)?

Thanks!

MichaelF_56 · ‎Jan 07, 2015

I checked with the developers today and most definitely, on the BCM20736/37, there is an impact on power consumption that is proportional to the fine timer setting.

Essentially, if the fine timer fires more often (i.e. wakes up, handles an event, then goes back to sleep), the part will consume more power.

On the BCM20732 (different firmware), this was not as much the case because the firmware/fine timer function was architected differently.

vik86 j.t

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Sleep Mode on 20736S

Sleep Mode on 20736S

Re: Sleep Mode on 20736S