Question

Write a program to toggle all bits of P1 every 200ms. Assume crystal frequency is 11.0592MHz.

Answer 1

Answer:

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Explanation:

Timer's clock frequency and its period

In 8051-based system, the crystal oscillator has a frequency of 11.0592 MHz when C/T bit of TMOD is 0. Each machine cycle is made up of 12 clock cycles. Hence for a single machine cycle, the frequency becomes 1/12 × 11.0529 MHz = 921.6 KHz.