Power Modes

[paynterf]

@lumos

I haven’t had a chance to get back to this after the initial effort but thought I’d post some information I also sent to Frank directly.

If you have a look at page 11 of the CC2511F32 datasheet it tells you the differences between the different power modes:
Sleep mode 1 has the digital regulator on and an expected consumption of 220uA (wake up time of 4uS)
Sleep mode 2 has the digital regulator off and an expected consumption of 0.5uA - 1uA (wake up time of 100uS)

As far as I can tell the main impact for most applications is how fast it can wake up in those modes.
So if that’s not a major issue then there’s no reason not to go into sleep mode 2.
There’s probably a few other caveats but if you’re just using it to lower power usage and do nothing else during that time then you might as well go to mode 2.

I have been meaning to get around to fixing up the compatibility between the radio and sleep functionality but haven’t had much time for personal projects lately - hoping to get back to it in the next few weeks / months though.

Lumos,

Thanks for the explanation, and THANKS for the effort to implement these sleep modes into the wixel-sdk. Your current drain numbers are considerably lower than mine - to be expected since I was measuring the entire Wixel and your numbers are just for the CC2511 - but the difference between sleep modes 1 and 2 are consistent with my findings. For my application, the difference in wakeup times is insignificant, so I plan to implement sleep mode 2.

Frank