题目内容

How many address signals are generated by 8051 to access external data memory by instruction MOVX @DPTR, A? ()

A. 32
B. 16
C. 8
D. 4

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DAC0832 is ()-bit DAC?

A. 4
B. 8
C. 16
D. 32

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8051 Timer 0 can be used as the baud-rate generator. ( )

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