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!
Reply by Andrew Smallshaw●May 5, 20092009-05-05
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
Reply by Grant Edwards●May 5, 20092009-05-05
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"!
Reply by John Speth●May 5, 20092009-05-05
>>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
Reply by Andrew Smallshaw●May 5, 20092009-05-05
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
Reply by Spehro Pefhany●May 5, 20092009-05-05
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.
Reply by Jack●May 5, 20092009-05-05
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
Reply by pasha●May 5, 20092009-05-05
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