题目内容

8051 serial data transmission is initiated by ().

A. setting TI flag
B. placing the data byte in SBUF
C. enabling Timer 1 interrupt
D. enabling Timer 1 running

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The 8051 timers in mode 0 will overflow if one more signal comes after the register reaching ().

A. 1FFFH
B. FFFFH
C. FFH
D. FEH

The 8051 has () 16-bit timer/counters.

A. 1
B. 2
C. 3
D. 4

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