05-13-2020 10:11 AM
I found an error which is very weird. Like the attached picture, if I change this value over 533.5, it shows this error. Hence, what's the meaning that the range is [100, 800] shown in the picture neither. Does anyone have some ideas about this?
05-13-2020 10:39 AM
05-13-2020 10:45 AM
If you are using DDR4-2133, your clock cannot be more than 1/2 of 2133, that is 1067. If you want to use a faster clock, choose a faster RAM, 2400, 2633 or whatever you can buy. RAM speed and availability change rapidly. Check with a supplier before choosing. Given a choice, pick a faster RAM. It will probably go obsolete later than a slower one and can give you more timing margin.
05-13-2020 10:48 AM
Dear @bruce_karaffa ,
I can understand the maximum freq. is 1067 Mhz. However, I can't understand why this value is halved using a PLL shown in the first picture, a.k.a why can't I achieve 800 Mhz or 1067 Mhz?