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自制的6672板子，ddr3的内存颗粒与开发板相同，但是用例程进行ddr初始化时leveling失败，参数也用excel表格进行了重新计算，还是不行。就像问问6678的ddr3初始化例程用在6672的板子上，是否有需要改动的地方？求指点。
6672与6678 DDR控制器是一样的，颗粒一样的话，只需要使用下面链接中DDR3 PHY Calc v10 spreadsheet根据PCB layout参数输入到表格，生成一组新的leveling初始化参数更新到DDR初始化即可。DDR初始化参考下面链接中列出的K1 STK.
http://www.deyisupport.com/question_answer/dsp_arm/c6000_multicore/f/53/t/53384.aspx
