kvrajasekar
New Member
Hi all,
I am planning to implement PLL using software(16f72 asm code)is it possible?.I dont get the required details to implement in software.
My input frequency is 50Hz(free run 50Hz).Lock range is 45Hz to 55Hz.
what i read from some article is it required reference frequency.can i use 4MHz crystal,but it seems too high.because the formula for divide ratio is fosc/fin.which gives 80000.
Why we need reference freq(is it for step wise increment/decrement of frequency?).How can i choose the reference frequency for 50Hz input.Please give me the steps to be followed for software PLL.
Please help me on this.
I am planning to implement PLL using software(16f72 asm code)is it possible?.I dont get the required details to implement in software.
My input frequency is 50Hz(free run 50Hz).Lock range is 45Hz to 55Hz.
what i read from some article is it required reference frequency.can i use 4MHz crystal,but it seems too high.because the formula for divide ratio is fosc/fin.which gives 80000.
Why we need reference freq(is it for step wise increment/decrement of frequency?).How can i choose the reference frequency for 50Hz input.Please give me the steps to be followed for software PLL.
Please help me on this.