题目内容

When 8051 serial port operates in Mode 2, to receive the ninth bit, it should read from ()

A. SM2 bit of SCON register
B. TB8 bit of SCON register
C. RI bit of SCON register
D. RB8 bit of SCON register

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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

DAC0832 is ()-bit DAC?

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

It is impossible for 8051 to read data from transmitting SBUF. ( )

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

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