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SDRAM中对应该参数为120K，这个K是什么意思啊是120*1000吗
是的。
1、T_RAS_MAX这参数该怎么计算啊，手册中没有说啊，只说了Maximum number of refresh_rate intervals from Activate to Precharge command。
2、我用的SDRAM Activate to Precharge command最大时间是120Kns
手册第805页上有公式T_RAS_MAX = tRAS_MAX/ SDRAM refresh rate) - 1http://www.ti.com/lit/ug/spruh91b/spruh91b.pdf
