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Timer 0 External Input T0

When a timer in the 8051 microcontroller is programmed as a counter, to which pin is the external clock pulse applied for Timer 0?

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Answer & Explanation

Correct AnswerD. P3.4

Quick Explanation

The 8051 assigns the external counter input T0 to port pin P3.4. Timer 1 uses T1 on P3.5, so Timer 0 counter pulses must be applied to P3.4.

D — P3.4

The 8051 assigns the external counter input T0 to port pin P3.4. Timer 1 uses T1 on P3.5, so Timer 0 counter pulses must be applied to P3.4.

Timer 0 External Input T0

8051: T0=P3.4, T1=P3.5.

8051: T0=P3.4, T1=P3.5.

8051: T0=P3.4, T1=P3.5.

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