Altera DDR Timing Wizard - Manual (Page 25)

Altera Corporation 2–13
November 2007 DDR Timing Wizard User Guide
Getting Started
If DTW failed to extract PLL clock information during the import
step, it asks you to input this information manually. The PLL Phase
Shift Selection
page ( Figure 2–8 ) then displays a warning indicating
“Missing required PLL clock info.” Figure 2–8 shows an example in
which the DTW cannot find the resynchronization clock from the
system PLL.
Figure 2–8. PLL Phase Shift Selection Page