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what is the highest possible DDR MCLK could be ?

Hi, 

my test using GEL to setup the DDR2 frequency is 

   unsigned int PLLM    = 19; // 14: 180M 15:192M 16:204M 17:216M 18:228M 19:240M 20:252M

   unsigned int POSTDIV =  0; //

   unsigned int PLLDIV1 =  0; //

   unsigned int PLLDIV2 =  1;

   unsigned int PLLDIV3 =  2;

don't know if this is the frequency 240M, 20 will get error. but datasheet said 150M is the highest frequency, any thing wrong?

 

Power Pan