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请教EMIF16的四个CE何时有效?



假设我每个CE上都接了一片32MB的NorFlash,我用论坛里给的程序,好像只能访问CE0外接的flash,因为观察到只有CE0信号线会变低,选中外面的flash。是与起始地址0X70000000有关吗?

请问:CE1、CE2、CE3如何控制变低,选中相应的flash?是靠初始地址0X74000000、0X78000000、0X7C000000解析出来的吗?

谢谢。