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Altera_Forum's avatar
Altera_Forum
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15 years ago

DDR PIN placement error

Hi all, I use a Cyclone IV E EP4CE40F23C8 with Quartus 11.0 I have this error message when i try to place ddr pins --- Quote Start --- Error: altmemphy pin placement was...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

--- Quote Start ---

Another question : have you any recommendation for flash memory pinout?

I use Spansion S29GL512N it dosen't work also :( (you can find the project archive to test flash here)

--- Quote End ---

The flash interface can use any compatible I/O pins.

Did you simulate your design with the Spansion flash model, or at least simulate it with a simple memory model and check that you have the read/write timing correct?

I've used the Spansion flash on many boards, without issues. Eg., see the timing on p30

http://www.ovro.caltech.edu/~dwh/carma_board/fpga_configuration.pdf

Cheers,

Dave