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Hello! I'm trying to implement DDR4 40bit-wide interface with 3 devices MT40A512M16LY-062E. When I connect only one of 3 devices to the project, calibration and data exchange do well, but when I connect all 3 devices - calibration fails. Why it happens and how can it be fixed?
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Hi Andrey,
Thank you for sharing those files.
It's looks like the sdram_a cannot be worked when enabling 16bit and combing with other memory.
I'm not sure what is the reason for that but I think it's could be related with the voltage.
So can you probe on your board at the sdram_a[7...0] and sdram[15...8] to analyze the voltage?
Regards,
Adzim
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Hi
just to make sure , do you use the 240 resistor as RZQ resistor on your board ?
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Hi Andrey,
Do you have any update on this?
Regards,
Adzim
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Hi, Adzim
Is it possible to get PCB layout of arria 10 soc development kit? It could help us check if our layout of DDR4 devices is correct.
Thank you!
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Hi
You can download the PCB layout of arria 10 soc development kit from the link here
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Hi!
just to make sure , do you use the 240 resistor as RZQ resistor on your board ? - Yes, we use it
So can you probe on your board at the sdram_a[7...0] and sdram[15...8] to analyze the voltage? - Everything with voltage is fine, but we need to update our board, so I will tell later about results
Thank you!
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