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bbb在已使用LCD触摸屏的情况下，能不能使用GPMC总线与TL16C554A来扩展其串口？
只要占用了GPMC总线，就不可以了吧
当然可以了，用GPMC A/D0-A/D7这8个数据线，再加上CS和读写控制线就可以了
