Power estimation

[Anonymous]

Sir,

   

Is it possible in PSOC  to estimate the power drawn by the processor while executing code? . If yes please give me instructions how to perform.

       

Thanks & Regards

   

Prashant

[ETRO_SSN583]

The easiest most straight forward method is to simply place a milliameter in
series with Vdd lead and measure Idd, another meter to measure Vdd at chip
Vdd pin. Then P = Vdd x Idd.

   

Another method is use PSOC to measure Vdd/2 and use a high side current sense
to measure Idd.

   

Regards, Dana.

[ETRO_SSN583]

I was not paying attention you want to do this while executing code.

       

PSOC can measure its own Vdd via use of internal reference and

   

a PGA with gain set to .5. Noite bias cannot be set to high in order

   

to get common mode in range to Vdd for PGA.

       

To measure Idd you need a high side sense, an external discrete solution

   

or a chip, like http://www.maximintegrated.com/app-notes/index.mvp/id/746

   

Other methods measure T rise in a sense resistor in Vdd lead, light level

   

of a calibrated emitter in series with Vdd lead.

       

Regards, Dana.