When the gate of the timers t0 and T1 is 1, the condition of whether the counter counts or not is selected.
A. Depending on TRX status only
B. Depends only on gate bit state
C. It is controlled by TRX and two conditions
D. Only depending on the state of the
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When timer T2 works in auto reload mode, its counter is () bit.
A. 8
B. 13
C. 14
D. 16 bit
In order to measure the width of the positive single pulse on the pin, the content of the special function register TMOD should be ().
A. 87H
B. 09H
C. 80H
D. 00H
When timer T1 of 8051 single chip microcomputer is used as timing mode, it is.
A. Timing by internal clock frequency, one clock cycle plus 1
B. Fixed by the internal clock frequency, a machine cycle plus 1
C. Timing by external clock frequency, one clock cycle plus 1
D. By external clock frequency timing, a machine cycle plus 1
When the timer T0 of 8051 single chip microcomputer is used as counting mode, it is.
A. Timing by internal clock frequency, one clock cycle plus 1
B. Fixed by the internal clock frequency, a machine cycle plus 1
Counting by external counting pulse, falling edge plus 1
D. Counting by external counting pulse, one machine cycle plus 1
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