Marko Panger

Power consumption (AN4270)

Discussion created by Marko Panger on Feb 20, 2012

Dear all,

 

I'm trying to evaluate the power consumption of a system around i.mx53. I've found an application note from Freescale which is based on some use cases:

 

http://cache.freescale.com/files/32bit/doc/app_note/AN4270.pdf

 

I'm particularly interested in the "Stop mode". According to the numbers given in the application note in this mode the DDR3 is operational and consumes 32mW out of a total of 36.5 mW.

 

Looking at the kernel sources this mode should put DDR3 in self-refresh mode and suspend itself into the internal RAM. In such a case I would expect a much lower power consumption for DDR3.

However those number are given for the Ubuntu image. Are they applicable also to the LTIB build ?

 

Thank, Marko

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