[SOLVED] Power consumption regarding

[PRABAKARDEVA]

If we are using Same (PIC or ARM) Microcontroller in (16MHZ and 32 MHZ)Oscillator frequency.

In which frequency controller consumes more power?

does frequency related to power?

 

[malli_1729]

Yes. Frequency directly related to power.

Power = K(Const) * Capacitance * V^2(voltage) * (Frequency)

 

[Venkadesh_M]

Power consumption increases with frequency. In some controllers to minimize the power consumption controllers will run in a less frequency in sleep mode.

 

[PRABAKARDEVA]

But ARM based microcontroller consumes only low power itself.

It's oscillator frequency is more than 50 MHZ...

how?

 

[Venkadesh_M]

But ARM based microcontroller consumes only low power itself.

It's oscillator frequency is more than 50 MHZ...

how?

I think me and malli_1729 forgot to mention another condition

Power = K(Const) * Capacitance * V^2(voltage) * (Frequency)
Edit:every parameter is for a same controller**

 

[malli_1729]

We given relationship between power consumed, frequency and other parameters..not given exact numbers..........
Based on Processors/Controllers power rating given some may be high power some may be low power.........

give references...Low power means...how much.... at what condition........

 

[PRABAKARDEVA]

LPC 1313 Microcontroller consumes low power of 3.3v itself.

Its oscillator frequency is upto 50 Mhz..

 

[Venkadesh_M]

consumes low power of 3.3v

Is that power ?, is its unit is V ?

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consumes low power of 3.3v

Is that power ?, is its unit is V ?

 

[Gorgon]

The max external oscillator frequency for LPC1313 is 25MHZ, and internal RC oscillator around 12MHz. I suppose the frequency used is then synthesised to a higher system clock frequency. ARM processors will normally have several clocks for the different sections, that you may select with a lower frequency to save power.

Generally a higher frequency means higher current consumption, but some processors makes it possible to change clock frequency dynamically during runtime, to save power when the high frequency is not needed.