I am looking for the lwest power Cortex M-?
I don't want to spend years searching the internet for a low-power ARM Cortex controller.
Does anybody know of one?
(And yes, it is Keil related since I'll be using Keil to program it)
Thanks,
--Cpt. Vince Foster 2nd Cannon Place Fort Marcy Park, VA
"2800mA/H"
I expect you meant 2800mAh @ 3.6V since you need voltage*current*time to get energy, and that you are talking about a one-cell battery. Say 8W usable after losses from a DC/DC.
Counting 12 hours operation and a 90% power reduction for the idle hours, that would give about 0.6W when active and 0.06W in idle. Assuming 50% for the cores to process instructions, and 50% for internal modules (DMA, UART etc) and external logic, you would have 0.3W for instruction processing.
If the claim of 0.09mW/MHz is true for the 0.13G process, your 0.3W would then be enough for 300/0.09 [MHz] = 3.3 GHz or 33 processors running at 100MHz.
Processors using the 0.18G process would give you 300/0.19 [MHz] = 1.6 GHz.
I really must have computed something wrong, but the figures sounds quite large ;)
Just a footnote, but I normally add a *0.5 as safety margin when doing initial calculations, to cover ageing of batteries, unknown late-stage requirement changes etc and still have a bit of extra engineering margin. Better to be able to reduce the battery size after measuring on prototypes than to have to figure out how to fit a larger battery pack in a too small box after the tools for making the box have already been produced.
Absolutely!!!
Follows the general "make it work first; optimise later" approach.
Please check Cypress PSCO5 (available only on january)
With some effort you can increase the power of these ones:
www.ehow.com/how_4791464_tone-flabby-arms.html
Really - at last?!
See: www.8052.com/.../165761