3 ms·
I've thought EMF32 are most efficient, but I've looked up NRF52840 and shocked: 150 uA/MHz fo EMF32 and 30 (!) uA/MHz for Nordic part, if I goggled it right.
by blacklion 2y ago
I've thought EMF32 are most efficient, but I've looked up NRF52840 and shocked: 150 uA/MHz fo EMF32 and 30 (!) uA/MHz for Nordic part, if I goggled it right.
- K0balt 2y agoYeah, the Nordic part is basically magic if you are careful. If these guys can do 10x on that, a whole market segment could move to energy harvesting / single use battery and battery life for other segments could double or triple. (Often the uC is not the big power draw)
- picture 2y agoIt's not hard at all to get good uA/MHz numbers, it just increases die size and cost. You can push it pretty far by tuning the synthesis, for example the same Cortex-M4 core on the Ambiq Apollo3 Blue advertises "6 μA/MHz executing from flash or RAM at 3.3 V" These are magnitudes of difference across the Espressif, Nordic, and Ambiq parts. The difference in price is also proportional. https://ambiq.com/apollo3-blue/ https://ambiq.com/apollo3-blue/
- K0balt 2y agoCool, il check that out!