That is fantastic Gilles. Just what I was after!! Thanks, Adrian ----- Original Message ----- From: "Gilles Blanquin" <> To: <> Sent: Friday, November 08, 2002 9:11 PM Subject: Re: [68HC12] XFC Loopfilter C and R values > > Hi Adrian. > > Found in this 68HC12 mailing list: > > A PLL components calculator program for the HCS12 is available on the Nohau > web site at: > > http://www.nohau.com/s12calc/pll_302.html > > Regards, > Gilles > At 08:11 AM 11/8/2002, you wrote: > >Hi All, > > > >Is anyone able to help me out with the setting of the Capacitor/resistor > >values for the PLL loop filter (going to the XFC pin) on the S12DP256. > > > >I am using a 4MHz crystal, and plan to use the PLL to generate the max bus > >frequency of 25MHz (50MHz PLL output). To do this I plan to use a value for > >REFDV of 3 and SYNR of 24. > > > >I cannot find any application notes on how to set the resistor and two > >capcitors (R0, Cs and Cp). > > > >If someone can point me in the direction of information to do this, or > >provide a calculation for me to use, that would be much appreciated. > > > >Regards, > > > >Adrian > > > >http://careers.yahoo.com.au - Yahoo! Careers > > > >- 1,000's of jobs waiting online for you! > > > > > >-------------------- > > > > > > > >">http://docs.yahoo.com/info/terms/ > -------------------- > > ">http://docs.yahoo.com/info/terms/ > http://www.sold.com.au - SOLD.com.au - Find yourself a bargain! |