basic problem with cycloneiii

[Altera_Forum]

I have a ep3c40q240c8.i can configure it from jtag and also program it's epcs16 and verifiy it.but the fpga after configuration have no effect.for example all pins are 1;no output affected by input;no pll work ... 

please help me

[Altera_Forum]

--- Quote Start ---  I have a ep3c40q240c8.i can configure it from jtag and also program it's epcs16 and verifiy it.but the fpga after configuration have no effect.for example all pins are 1;no output affected by input;no pll work ... please help me  --- Quote End ---    Hi,  which Quartus Version did you use and what kind of programming files ?  Kind regards  GPK

[Altera_Forum]

If your Quartus Version is 9.1 then this is the case, as this Quartus Version has a bug in generating the required files for programming EPCS devices. This bug will be fixed with the next service pack. (a patch is availabe via MySupport).

[Altera_Forum]

thanks for reply. 

my quartus is version 8.0. and it's programming file for epcs16 is *.pof. regards

[Altera_Forum]

if you can check your image via jtag and it runs as expected, then the source should be epcs & fpga connetion related. 

 could you verify that the MSEL pins are setup for AS mode ?  when powering up the system, do you see the fpga request at the epcs pins ? you should see the DCLK and other signals...  if this happens, do you see changes at the output of your epcs device that it is responding ?

[Altera_Forum]

thanks all . 

i remove Schottky diodes near epcs and every thing is ok. i donot know why!!!!!!!:)