External capacitive load in Max supply current for IO (i.MX6 processor)

[dhvanish_parekh]

What should be the value considered for external capacitive load in Max supply current equation for i.MX6x processor described in datasheets?

See below details copied from the datasheet: 

General equation for estimated, maximum power consumption of an IO power supply:
Imax = N x C x V x (0.5 x F)
Where:
N—Number of IO pins supplied by the power line
C—Equivalent external capacitive load
V—IO voltage
(0.5 xF)—Data change rate. Up to 0.5 of the clock rate (F)
In this equation, Imax is in Amps, C in Farads, V in Volts, and F in Hertz.

[igorpadykov · Accepted solution]

Hi Dhvanish

typical C may be 20-50pf, more accurate values can be found from ibis modelling or

using AN2536 High Speed Layout Design

http://cache.freescale.com/files/32bit/doc/app_note/AN2536.pdf 

Best regards
igor
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