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28377D的EMIF问题

在16位异步SRAM正常模式时,观测CE脚、WE脚、OE脚,主频200M,1/1分频,一个clk周期应该为5ns,配置出来三个脚都有不同程度的延时,而且波形很糟糕,30ns的WE和OE低电平时间实际为50ns和60ns,尤其是WE管脚,在低电平阶段有一个高电平尖峰,把周期放慢10倍后波形正常了,但是延时和WE高电平尖峰依然存在,我用的是V190control suite,请问在配置EMIF时有什么错误会造成这种现象么?谢谢~