Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

PLL dedicated external clock output pins in cyclone II EP2C20F484c7 FPGA

hi all, I am using Cyclone II FPGA Starter Development Board which contains cyclone ii ep2c20f484c7 FPGA to drive 800*480 color LCD. For external interface with LCD, i am using the two 40 ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

With Cyclone II, PLL2 could be only used when clocked by a connected dedicated clock. I think, no clock is connected to PLL2 dedicated inputs with the starter board. If I'm right, PLL2 clock output couldn't be used. But I wouldn't overrate the said warning. The clock is usable with defined timing anyway.