请问 EMIFA[23:22] behave as address selects，这个EMIFA[23:22] 是如何控制的，我对EMIFA[23:22] behave as address selects. For 16-bit interface, EMIFA23 is connected to address pin A0 of the ASRAM/NOR Flash. For 8-bit interface, EMIFA[23:22] are connected to address pins A[1:0] of the ASRAM/NOR Flash.这段话不理解，能解释一下吗，为什么EMIF的最高位要连接FLASH的低位地址
