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Issues about DDR Freq

Question asked by tony.l.cai on Aug 2, 2015
Latest reply on Aug 2, 2015 by Yuri Muhin

Hi, all

     I'm so confused about some concepts regarding the freq. One is arm core speed,another is DDR freq. And when I run the DDR stress tool, we will see as follow:

And the MMDC support the max freq is 400MHz, Why can we change the freq to more than 400MHz,such as 672MHz? So the freq here means the Arm core speed?

and when I change the governer we will find its max freq(996MHz), its min freq(396MHz), and I think it is arm core speed, So what is the correlation between the freq in governer and in DDR stress tool? Will the DDR freq change when I change the arm core speed via the governer? If so, how can I get the current speed about the DDR? 3Q~