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Maximum measurable frequency

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Neyolight

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Hello Everyone!

I want to know what is the maximum frequency my PIC can measure with the following characteristics :

1) Im using PIC18F4620 on a PICDEM 2 PLUS demo board

2) Using Internal oscillator ( OSC = INTIO67) at 8MHz

3) Instruction clock = System clock/ 4 = 2Mhz

4) Frequency reading at pin RC1

5) Timer 0 is configured to create an overflow every 0.06 sec

6) Timer 1 reads the rising edges on RC1

What is the maximum frequency that I can measure with this configuration? Regardless of the frequency source, what is the maximum frequency my PIC is programmed to measure?

Thanks :smile:
 

dear I think your timer will define this parameter.
if you set T=0.06sec
f=1/T=16.667Hz
It may be false if anyone agree or disagree please confirm.
 
I am agreed to shahbaz.ele
your timer will define measuring frequency.
 

Timer1 is reading the pin RC1, so I think Timer1 time will define the frequency as calculated by shahbaz.ele
 
Timer 0 is only creating the time 0.06 while Timer 1 is capturing the input frequency at RC1.

Frequency = Input edges/ Time

Unsure what is the maximum frequency that Timer1 can capture accurately!
 

its timer 1 measuring the RC1 pin reading frequency.
surely
 

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