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Low Power Myths

Question asked by bil.til on Mar 29, 2014
Latest reply on Mar 29, 2014 by Clive One
I have some IoT application, where power gets quite critical. Comparing the current/MHz of different suppliers, I found the best STM32 in the STM32L0 line at about 80uA/MHz.

Atmel proposes a pico-line with 70uA/MHz (SAM D20). This sounds very impressive, but looking into the datasheet specs, I see that they specify the current consumption data with the flash running on 3 waitstates (although they say, that their CPU can run also at 0 waitstates from flash up to 16 MHz). Does this mean that the CPU then runs only at about 1/3 of the speed? Anyone here maybe has some deeper understanding of this?

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