Altera Stratix - External Clock Outputs

1–10 Altera Corporation
Stratix Device Handbook, Volume 2 July 2005
Enhanced PLLs
range from 1 to 512 with any non-50% duty cycle setting. The Quartus II
software automatically chooses the appropriate scaling factors according
to the input frequency, multiplication, and division values entered into
the altpll MegaWizard Plug-In Manager.
External Clock Outputs
Enhanced PLLs 5 and 6 each support up to eight single-ended clock
outputs (or four differential pairs). See Figure 1–5.