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Altera_Forum's avatar
Altera_Forum
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15 years ago

Cannot work

Firsr I built a project includes Nios II ,memories ,it works. When I added a DDR2 SDRAM controller, not only the DDR2 does't work but also the system . The pin assignment has been finished. Wh...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

It depends on your design. If you have a reset button and it has the correct polarity, try connecting it. Or you can connect it to a bit of a PIO if you want the system to self reset.

If these signals are active high while the reset_n is active low, put a NOT gate.

I think that someone else, just yesterday, had a similar problem and went around it stucking the reset_n to high level (a signal fixed to '1' or a VCC primitive in bdf file)