题目内容

The instruction MOV TMOD, #30H will ().

A. configure Timer 1 as a timer in Mode 2
B. configure Timer 1 as a timer in Mode 3
C. configure Timer 0 as a timer in Mode 2
D. configure Timer 0 as a timer in Mode 3

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An alternate function of port pin P3.4 in the 8051 is ()

A. Timer 0 input
B. Timer 1 input
C. Externl interrupt 0 input
D. Externl interrupt 1 input

The timers in Mode 1 overflow when the register reaches ()

A. 1FFFH
B. 0FFFH
C. FFH
D. FFFFH

The timers in Mode 0 overflows when the register reaches ()

A. 1FFF
B. 0FFF
C. FF
D. FFFF

For a given crystal frequency, minimum time delay generated by Timer 0 is in ()

A. Mode 0
B. Mode 1
C. Mode 2