How to choose prescale and postscale of timer2 for PIC18F252
- Thread starter mermaid09
- Start date
Prescaling simply reduces the frequency of the input pulses by a known factor. If 20 MHz is too much, apply the pulse train to an external counter so it does a divide by 20 operation. Then, the input pulses are at a frequency of 1 MHz.
Postscaling is translating the count into engineering units, like RPM. That just relates the value in the counter to some meaningful figure.
Postscaling is translating the count into engineering units, like RPM. That just relates the value in the counter to some meaningful figure.
Go to www.microchip.com
Go to datasheets and choose PIC18F252
You will find many applications notes there. There should be one for timer 2.
Go to datasheets and choose PIC18F252
You will find many applications notes there. There should be one for timer 2.
