Contributorwill 64bit EMIF works with a 72 bits DDR4
Dear Inter support and expert
I am porting a TI demo to Arria GX development board, the original design was a 64bits EMIF. and the DDR module is 72 bits.
to make it simple, I hope I can use 64 bits EMIF directly drive a 72bits module, because I don't care the last 8 bits. I hope this works but I am not sure, can someone who have passed this hassle give me a confirmation.
if I have to change the EMIF interface to 72 bits to match the DDR4 module. then how to handle the 9th byte, as all internal memory bus are based on 8 byte.
Thank you very much.
David
Hi David,
In case you're doing some demos, I think it's good for you to create an EMIF example design with Arria 10 Dev Kit preset where you can choose the preset in the EMIF Parameter Editor.
The preset will set the parameter that match to the Arria 10 Dev Kit.
The 72 bits = 64 bits Data + 8 bits ECC.
If you enabled the ECC in your configuration, then you will have 72 bits interface.
Else your interface should be 64 bits.
-Adzim
