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We use many different peripherals, mostly to accommodate inter-processor communications.

Iron

The fastest clock rates I've seen used in some of our battery powered designs are 25Mhz - 50MHz (CPU clock).

Iron

I am a software engineer, my primary focus is embedded software development. I have spent the last 23 years working in the medical device industry.

Iron

Downloading the slide pack.

Iron

Hello from Beaverton, Oregon.

Iron

hello all from Edmonton, Alberta.

Better late than never, getting caught up.

Iron

once again, thanks sir warren for an excellent presentation and that's GREAT!

now i am preparing for day 3 lecture to finish the class of this session...

thanks once again to DIGI-KEY and DESIGN NEWS for giving this kind of continuing education...

thanks to all coleeagues....bye...

i am now on slide 18...GREAT!

i am now on slide 11...

i am now on slide 6...just learning about the topic sir warren...

i am now downloading the lecture slides and about to begin now with sir warren...

good afternoon once again sir warren, here i am again for your day 2 class...

Low power mode for body wornd sensor devices

Iron

I just watched the recorded version of the class.  Thanks.

Iron

Warren thanks again for a thorough presentation

Iron

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.

Great to have access to the recorded sessions!

Iron

Better late than never...

Iron

Taking the offline class

Iron

Thanks for the informative lecture

Working with the arduino nano to expore lower power designs

work with msp430 using memory FRAM is good for low power energy.

 

Iron

The choice the Mcu is very important.

 

Iron

Very nice presentation. Thanks Warren.

Iron

I mostly use peripherals PWM, Serial Interface etc

Iron

I generally design with 20 MHz. So what should be the lowest power bound for my design?

Iron

USB, SPI, I2C, 1-Wire these protocols I generally use and want to implement Low-power modes for these.

Iron

Thanks Warren; excellent presentation

Iron

Great lecture. I'm jumping to the next one

Thanks

Iron

Hello,

 

Catching up, will hopefully be up to speed for this afternoon lecture.

 

I'm interested in sensor network low-power issues.

Thanks

Iron

I tend to use communications peripherals most in my designs

Iron

Embedded Engineer in Medical Devices

Iron

automotive applications

Iron

typical clock rate is 12MHz

Iron

Typical clock rate is 8Mz, or 16Mz, or 20Mz

Iron

Thank you Warren, good presentation!

Thanx everyone for attending.

Note that the link in the reference slide for the RL78 Low Power White paper is wrong. It should be: 

http://am.renesas.com/media/products/mpumcu/rl78/Snooze_Mode_Feature.pdf  

Iron

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).

Iron

Again, thanks for the great presentation...

Iron

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.

Iron

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!

Iron

So if having a backup battery is necessary for using standby mode, we would need to calculate the power needed for this too, right?

Iron

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.

Iron

Thanks for the presentation Warren!  

TI has come out with some persistent memory 430 with Ferrocentric memory (FRAM) instead of SRAM and flash.  Have you looked at those?

Put differently, would backup SRAM power insure that stack and variables not be lost during standby use?

Iron

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. 

Iron

Thank you all.

I can,t help but wonder what the t-shirts look like.

Iron

Thanks Warren, great job, and great slides.

 

Roy

Iron

Thanks again Warren!

Iron

erichard- Wake times usually include all the time needed to move into Run mode. You should check your specific MCU data sheet to be sure.

Iron

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.

Iron

Thanks Warren et.tal.,

Great presentation and resources.

Iron

Thanks Lauren & Warren

Iron

Thanks for the valuable info Warren...

Iron

Thanks Warren M. Great Job!

 

Iron

Thanks Warren  & Lauren.

Iron

Does standby wake time include state recovery following cycling of SRAM power?

Iron

Thanks Warren presentation was very useful

 

Iron

Thanks Warren! Nice presentation!

 

Iron

Warren, Thank you for another great presentation.

Iron

SPI, I2C ADC's, UART

Iron

USB, I2C, RS232, SPI, Analog

8MHz

UART, I2C, Timers, external radio chip (Silicon Labs)

Iron

Thermal, Photo Sensors, Keypads, LCD, LED, Stepper Motors

Iron

Usually I2C, Serial, A/D. Want to incorporate USB and Wireless interfaces within Low power framework

Iron

Watch dog, timers, external pin most common wake up sources. A/D less often.

Iron

lots of timers, some ADC. 

Timers, Spi,Serial port

Iron

QEP - motor control block, ADC, DAC, timers - these are mostly used in our projects

Iron

ADC, Interrupts, Serial 

Iron

With the exception of GPS and accellerometers, most of my sensors are analog.

Iron

wdt and UART functions

Iron

SPI interface to external A/D converter

Iron

Serial communication, SPI, I2C, UART

Iron

For wake up, typically timer driven.  During wake, A/D etc

Iron

Serial comms, timers, ADC

Iron

timers & serial ports

Iron

A2D

SR wireless

RTC

Watchdog

Iron

HW interrupts and timers

Iron

Lots of clock rates 16MHz MSP430 80MHz Stellaris LM4F up to 120MHz SAM4S

Iron

OS-based Geode, ARM 11 etc up to 700MHz

 

ARM-M4/M3/M0 - up to 150MHz, but typically <30MHz, sleep down to 32k/12kHz

Iron

>400 MHz on a lot of the systems I work on...

Iron

typical clock is 24.576Mhz.

 

for our lowpower applications 1MHz typical max although a few to 4MHz for short durations

Iron

For embedded systems that have power management 16MHz has been the upper limit so far. Did one design at 400KHz for battery life.

Iron

Commonly 16MHz sometimes 32-48 MHz

Iron

4MHz with lots of sleep in between, seldom compute bound.

16 MHz for our cable network devices but mostly 3.68 MHz for our wireless stuff

Iron

80mhz max, when performing sd card rw.

Iron

Have not worked with this kind of design

 

Iron

32 MHz, for high processing speed (DSP capabilities).

Iron

8 and 16 MHz on 8-bit MCUs mostly

Iron

Common speed is 40mhz, but often 64mhz.

 

Iron

really low power, lemon with copper electrodes

Iron

Data acquisition, logging and transmission.

Iron

Really low power, coin cell or energy harvesting powered sensors would be interesting.

Iron

Low power usage of MCU for sending sensor data back to host wirelessly. Interrupt based wakeup and controlling high startup usage power

Iron

remote (battery) radio monitoring.

solar pannel control &monitoring.

Iron

Battery operated data logging and transmission. Inputs include pressure, motion, flow, and temperature.

Transmission is via a secure RF channel(s).

Iron

wearable sensing systems (wireless and memory logging)

Iron

Battery powered remote monitoring - for instance, getting the most life out of batteries when reporting back hourly sampled sensor data

Iron

for examples, could you include EMI susceptability differences when in low power modes?

Iron

working great for me in firefox

Iron

TI MSP430 for use in change in state - open or closed loops

Iron

Low power techniques for battery powered wireless devices

Iron

remote control device, battery powered, bluetooth

Iron

low power multi nodes remote sensor

Iron

the audio is not good

 

Iron

Engineering management now. 4 decades and counting. Yikes!

Iron

audio won'T start but was working for me yesterday...

 

Iron

SW Engr, QA, 20+ yrs Program C, C

Iron

Sound seems to be breaking up a bit today

Iron

Mixed signal IC design and verification by day, everything electronic by night. ~20 years. 

Technical manager, 15+ years

Had to refresh a few times

 

Iron

Sr. R&D Electronic Technician

Iron

Embedded Software Engineer 3 yrs

 

Iron

Low Power R&D, 6 yrs

 

Iron

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

Iron

Medical device engineer, Toronto, Canada. EE, 10+yrs.

Iron

Quality control, engineering aide

Iron

Localization Engineer Less than a year

Iron

audio finally working, click the start button serveral times.

 

Iron

Embedded Controls Engineer - lots of years

Iron

Sr Embedded Sys Des Eng (20+ yrs)

Iron

Embedded systems architect/developer - about 6 years

Iron

Research support/design - UF

 

Iron

Hello from Cedar Park Tx

30+ years Electrical Engineering

Iron

Had to restart page

wouldn;t start

ok now

Iron

Here we go, audio is up!

Iron

Hi,  Did it start yet?

Iron

Audo is ON yet?

 

Iron

Hi from Upstate New Yorl State (Home of Miss America)

Iron

Usually I could go on and on about the great Santa Cruz weather, but we've had a cold spell. At least there's no snow.

 

 

Iron

Ice wine?   Brrrrrrr....    :)

Good morning from Irvine, CA

folks do pay extra for ice wine !

Iron

Howdy folks!!   It's so cold here even the moonshine is icing up!!   :)

Good morning from Santa Cruz, CA

 

Iron

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)...

Iron

Come on, anyone out there in someplace with "nice" weather? Hawaii maybe?

Iron

Hello from sunny SE Lake Simcoe Ontario Canada. Ok so maybe it was only sunny for a few minutes today -- but at least it was only 8C below Zero.

Iron

Howdy from TX where we have snow!

Good afternoon everyone

Iron

Hello from Calgary, Alberta, Canada. It is 40 F (5 C) right now! Global warming has finally arrived.

Iron

Please join our Digi-Key Continuing Education Center LinkedIn Group at http://linkd.in/yoNGeY

Platinum

Hello from Scottsdale, currently sunny 31 degF with high of 51 degF

Iron

Good day from the very wet and soggy south.

Iron

We're on a warming trend... 26 degF for the high today in Minneapolis.

Iron

Good Morning all, it really is warming up, 14F today here in SLC, UT, it is slowly warming up.

Iron

Also tuning in from Chicago! Looking forward to today's lecture.

Iron

The streaming audio player will appear on this web page when the show starts at 2pm eastern today. Note however that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser.

Platinum

Greetings everyone.

 

Iron

Good morning. Looking forward to the class

 

Iron

Good Morning from San Jose, CA.

Freeze Alert this morning!

It's 33°F with a Hi of 57°F.

Iron

Good morning from Scottsdale

Iron

Be sure to click 'Today's Slide Deck' under Special Educational Materials above right to download the PowerPoint for today's session.

Platinum

Good Morning from Tennessee.

Iron

Thanks for a good introduction Monday.  The energy harvesting stuff looks really interesting.



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