Page 45 - DEC40053 Ebook_Timer

example:-

Find the time delay and write a C18 program

to toggle all the bits of PORTB continuously

with some delay. Use Timer0, 16 bit mode,

and no prescaler options to generate the

delay (square wave of 50% duty cycle ) with

TMR0H and TMR0L is FFF2

Answer:-

Fosc/4 = 10MHz/4 = 2.5MHz

T = 1/Fosc = 1/2.5MHz = 0.4us

NOC = (FFFF - FFF2) + 1 = 0E(hex) = 14(dec)

Delay = NOC x T x Prescaler

= 14 x 0.4us x 1 = 5.6us

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