题目内容

The command to start timer 0 to start counting is to make TCON.

A. TF0 position 1
B. Tr0 position 1
C. Tr0 position 0
D. Tr1 position 0

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The instruction to stop counting the timer T1 of 8051 is to stop counting the timer T1 of TCON.

A. TF0 position 1
B. Tr0 position 1
C. Tr0 position 0
D. Tr1 position 0

When the timer T1 mode 1 is used to count, the overflow flag is required to be generated every 10 times, then the initial values of Th1 and TL1 are ().

A. FFH、F6H
B. F6H、F6H
C. F0H 、F0H
D. FFH、F0H

The timer T1 mode 2 is used to count. It is required to send interrupt request to CPU every 100 times. The initial values of Th1 and TL1 are().

A. 9CH
B. 20H
C. 64H
D. A0H

The timer overflow flag of MCS-51 is.

A. Tr1 and tr0
B. IE1 and ie0
C. It1 and it0
D. TF1 and TF0