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28338的XINTF中的CS7、WE、RD等信号的操作

我把一个以太网芯片W5100外扩到28335的ZONE7上,请问进行写操作的时候,是不是只要我写的地址是0x200000以上的时候,CS7、WE、RD等信号的置低是自动操作的,还是需要在软件中自己编写的呢?