
Originally Posted by
Pntgrd
An engineer I am not, that would be my Daughter. I have read and read this thread and took a few notes and this is what I have come up with as a start. If I want to use 1.45 vcc I should set vTT about .2 higher so let's say 1.47vTT. With that vTT the GTLref would work out to .54mv using the 0.80/vTT formula. I should also set PLL at 1.67 using the Vcc x 115% formula, and set vNB to the same. NBGTLref would be -.29mv using the 1.2 x.63 minus the 1.47 x .63 formula. Broken down it would be like this:
If vCC = 1.45 then:
vTT = 1.47
PLL = 1.67
cpuGTL = .54
NBGTL = -29
NBv = 1.67
Did I get this right as to getting a starting point?
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