Error fed by 5 non-global control signals -- only 4 control signals may be non-global

[Altera_Forum]

Guys, 

 I got error on compiling PCI-compiler Error fed by 5 non-global control signals -- only 4 control signals may be non-global  Is it related with pin assigment ? What should I fix ?  I'm using Quartus II version 8 and Cyclone II EP2C8Q208  Thanks for helping

[Altera_Forum]

You need to assign some signals to global networks. I don't know CII well but I know that later families can't feed all the clock signals in a LAB from local routing; some of them have to come from global routing as well. Use the assignment editor to make the assignments, or google "Quartus assign global" to find examples of how it's done. 

 Cheers, Adrian

[Altera_Forum]

--- Quote Start ---  You need to assign some signals to global networks. I don't know CII well but I know that later families can't feed all the clock signals in a LAB from local routing; some of them have to come from global routing as well. Use the assignment editor to make the assignments, or google "Quartus assign global" to find examples of how it's done.  Cheers, Adrian  --- Quote End ---   Thanks for your suggestion Adrian, how about Cyclone II clock, is it from crystal or from PLL, I'm abit confuse... thanks

[Altera_Forum]

I don't believe any of our devices have on-board crystals (disclaimer: I'm a software guy, not hardware) so you have to generate the signals off-chip and feed them into the device through a pin. At that point you can use the clock directly, or use it to drive a PLL and use the PLL-generated clock. Check out http://www.altera.com/literature/lit-cyc2.jsp for more details on the hardware; to instantiate a PLL using Quartus, see http://www.altera.com/literature/ug/ug_altpll.pdf.