Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Never having looked at one, I would presume it's so you can use a faster clock while using a slower crystal.
The 18F series do this, a 40MHz crystal would be difficult to make, and very expensive - so it uses a 10MHz crystal (easy to obtain and cheap) and a x4 PLL.
In the case of the PIC32, there are a ton of clock registers, including a core and peripheral bus clock. Beside the PLL, there are multipliers AND divisors to concoct any sort of clock you may desire. Best to grab the particular data sheet to see what's up. Guessing the PLLFBD is some sort of divisor.
It's PLL feedback divisor. It provides a factor, by which the input to the VCO is multiplied. This factor must be selected such that the resulting VCO output
frequency is in the range of 100 MHz to 200 MHz ( for dsPIC33F).
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.