The average power consumption of the MSP430

Hi all,

I hope that you'll be fine. I am pretty new to the embedded systems. We
are planning to use MSP430 for our prototype SoC for WSN.

I am not sure about its average power consumption. Does someone has any
figures regarding the power consumption of MSP430 or know how to
calculate/estimate it?

Thanks in advance,

Adeel Pasha 

On 5 Mag, 15:06, "pasha" <adeelpa...@gmail.com> wrote:
> Hi all,
>
> I hope that you'll be fine. I am pretty new to the embedded systems. We
> are planning to use MSP430 for our prototype SoC for WSN.
>
> I am not sure about its average power consumption. Does someone has any
> figures regarding the power consumption of MSP430 or know how to
> calculate/estimate it?

it should be written in the datasheet.

Bye Jack

On Tue, 05 May 2009 08:06:48 -0500, "pasha" <adeelpasha@gmail.com>
wrote:

>Hi all,
>
>I hope that you'll be fine. I am pretty new to the embedded systems. We
>are planning to use MSP430 for our prototype SoC for WSN.
>
>I am not sure about its average power consumption. Does someone has any
>figures regarding the power consumption of MSP430 or know how to
>calculate/estimate it?
>
>Thanks in advance,
>
>Adeel Pasha 

You might consider referring to the datasheet for the particular model
you've got in mind (Electrical Characteristics). It will depend on
mode, supply voltage, clock frequency, which peripherals are active
etc. 

On 2009-05-05, pasha <adeelpasha@gmail.com> wrote:
> Hi all,
>
> I hope that you'll be fine. I am pretty new to the embedded systems. We
> are planning to use MSP430 for our prototype SoC for WSN.
>
> I am not sure about its average power consumption. Does someone has any
> figures regarding the power consumption of MSP430 or know how to
> calculate/estimate it?

Current consumption is given in the relevant datasheet - I have
here an F15x, F16x, F161x where the data is on page 26.  TI don't
help by not putting a table of contents in their datasheets.

For back of an envelope stuff it is always under 1mA per MHz.  I've
always found that it falls into the "consider briefly, then totally
ignore" category.

-- 
Andrew Smallshaw
andrews@sdf.lonestar.org

>>I hope that you'll be fine. I am pretty new to the embedded systems. We
>>are planning to use MSP430 for our prototype SoC for WSN.

I've used the MSP430 on numerous projects.  I can say with certainty that
your code will have a huge impact on the device power consumption.  If you
need to be in the tiny range (all clocks off), then you need to consider
clock restart time and if you can tolerate that with your system
requirements.  Also, I was caught off guard when I was looking into power
draw that what devices are connected and how the pins are configured can
have a big impact on power draw as well.

There's lots (and lots, and lots) to consider in the design.  You might be
better informed if you try to build a bench model of your system and
investigate it first hand.  The datasheet gives optimistic and general
guidelines on power draw but it's so application dependent that it's not
much help.

JJS

On 2009-05-05, Andrew Smallshaw <andrews@sdf.lonestar.org> wrote:

> For back of an envelope stuff it is always under 1mA per MHz.
> I've always found that it falls into the "consider briefly,
> then totally ignore" category.

Lucky you.  Some of us have had to worry a lot about power
microprocessor consumption. ;)

-- 
Grant Edwards                   grante             Yow! Xerox your lunch
                                  at               and file it under "sex
                               visi.com            offenders"!

On 2009-05-05, Grant Edwards <grante@visi.com> wrote:
> On 2009-05-05, Andrew Smallshaw <andrews@sdf.lonestar.org> wrote:
>
>> For back of an envelope stuff it is always under 1mA per MHz.
>> I've always found that it falls into the "consider briefly,
>> then totally ignore" category.
>
> Lucky you.  Some of us have had to worry a lot about power
> microprocessor consumption. ;)

Of course.  If the power is consuming microprocessors that sounds
problematic to me. ;-)

-- 
Andrew Smallshaw
andrews@sdf.lonestar.org

On 2009-05-05, Andrew Smallshaw <andrews@sdf.lonestar.org> wrote:
> On 2009-05-05, Grant Edwards <grante@visi.com> wrote:
>> On 2009-05-05, Andrew Smallshaw <andrews@sdf.lonestar.org> wrote:
>>
>>> For back of an envelope stuff it is always under 1mA per MHz.
>>> I've always found that it falls into the "consider briefly,
>>> then totally ignore" category.
>>
>> Lucky you.  Some of us have had to worry a lot about power
>> microprocessor consumption. ;)
>
> Of course.  If the power is consuming microprocessors that sounds
> problematic to me. ;-)

It does get expensive...

-- 
Grant Edwards                   grante             Yow! I can't decide which
                                  at               WRONG TURN to make first!!
                               visi.com            I wonder if BOB GUCCIONE
                                                   has these problems!