单项选择题
A.2个数据缓冲寄存器 B.256BRAM C.8位输入寄存器 D.8位DAC寄存器
A.A1A0=00 B.A1A0=01 C.A1A0=10 D.A1A0=11
A.00H B.40H C.80H D.FFH
A.41H,42H B.42H,41H C.62H,61H D.61H,62H
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