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AKorn9
Beginner
454 Views

DDR4 I/O standard 1.2-V POD

Greetings!

 

I try to use PhyLite and my own memory controller. So I try to use "1.2-V POD" I/O Standard. But in the Quartus report I can see "Ignored Value" in the "Ignored Assignments" section to my group_0_data_io[*].

The bank voltage is 1.2 V. I/O standard in the QSys is "1.2-V POD" too.

What do I wrong?

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4 Replies
NurAida_A_Intel
Employee
98 Views

Hi AKorn9,

 

Can you provide the full error messages that generated from Quartus and from which stage you seen the error?

 

Thanks

 

Regards,

NAli1

 

AKorn9
Beginner
98 Views

Hi NAli1_Intel! Thank you for answer!

 

In fact it is not an error message. I can see it after fitter process finished.

 

ignored.png

 

 

And I can not read data from DDR4. I am using Arria 10 device kit and HiLo daughter card. Unfortunately it is very complicated to connect an oscilloscope to the daughter card and I do not know how memory chip answer to the commands.

To the qsf I added the next strings:

 

set_instance_assignment -name IO_STANDARD "1.2-V POD" -to DQ[0]

set_instance_assignment -name VREF_MODE VCCIO_70 -to DQ[0]

 

...and so on.

 

But it seems the PhyLite does not work as I expect.

 

AKorn9
Beginner
98 Views

I changed 'IO settings' in the 'General' tab in the Qsys from '1.2-V POD' to 'None'. This warning is gone. PHYLite with DDR4 works perfectly.

NurAida_A_Intel
Employee
98 Views

Dear Akorn9,

 

I apologize for the delay in response as I were out of office due to holiday. Glad to know that your design is working perfectly now. And thanks for sharing the workaround. Really appreciate it 😊

Feel free to post any update in Intel Forum if you encounter any issue in future.

 

Thanks and have a nice day !

 

Regards,

NAli1

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