I think I halted, snoozed and slept, but never deep slept -- trying to be efficient, conserve energy. Slide 16 is a good summary chart, good way to review. Some applications put a heavy load on you and have a lot of repetition or take a lot of processing time. Good examples and resource references tied the presentation together well.
erichard- I find that battery back-up power is typically used when the rest of the MCU is running off of a mains power supply. If the power the MCU is using is important to know, then you are correct that the battery power must be included. Luckily battery back-up power is typically in the nA range (for most of the recent Low Power MCUs).
Black tee with Design in red, news.com in white on the front. Something about being a 21st century embedded design engineer. Nix on the back. Thinnish. Kool enuff.
richwillaims- Yes the ferro RAM is a very interesting development. I'm expecting more MCUs to move in this direction. This technology can offer the best of both Flash and SRAM and ferro RAM has some really robust environmental characteristics too!
erichard- Back-up power almost always keeps SRAM powered up (as long as the voltage level is high enough). I can't think of any MCU off the top of my head that wouldn't.
mharkins- You are correct. With some data flash implementations (most of them actually) there are voltage limits needed to write to Data Flash. If there is an on-chip regulator this can also make a difference.
One other consideration I've ran into when using data flash is that there are osc requirements that are tied to voltage limits. the lower the voltage, the slower the osc needs to be.
10 years of experience in hardware and firmware design, specializing motorcycle electronics and racing electronics for motorcycles and cars. I program in C and assembly
Seems to be another broken link in the reference slide. Here is a working link to the RL78 Low Power White Paper http://am.renesas.com/media/products/mpumcu/rl78/Snooze_Mode_Feature.pdf
You might want to save it to your copy of the PPT slide deck on the Reference Slide (near the end)...
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