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DM388的GPMC_A[24]的问题



DM388的手册中Table 3-20. GPMC Terminal Functions中GPMC_A[24]对应了3个管脚,AC3, AE3, Y11。并且3个管脚都对应mode=02的情况。

请问同一信号对应3个管脚是为什么?他们之间有什么区别?