Chapter 4 Timer Operation

By: Masud-ul-Hasan

Ex4-1: Pulse Wave Generation

Write a program that creates a periodic waveform on P1.0 with as high a frequency as possible. What are the frequency and duty cycle of the waveforms?

ORG 0000H

LOOP: SETB P1.0 ; one m/c cycle

CLR P1.0 ; one m/c cycle

SJMP LOOP ; two m/c cycle

END

Frequency = 1/4µs = 250kHz

Duty Cycle = 25%