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Altera_Forum's avatar
Altera_Forum
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12 years ago

Multi SD CARD controller

Hi all, I'm doing a design with 4 SD cards, in sd 4 bits mode at 50MHz in parallel with an embedded Nios on a ARRIA V target. Here are the facts: - By instantiating the sd ip without Nio...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

How have you constrained this?

Yes, you will have to ensure you clock to out times are appropriate. However, you mention running at 50MHz - I don' think you should have much of a problem in Arria running at that frequency.

Are you registering data on and off the FPGA in the I/O cell?

Are you happy that, in connecting up your Nios core, you haven't inadvertently incorrectly connected something?

Regards,

Alex