Programmable Devices
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problem using altmemphy to read ddr2

XQSHEN
Novice
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1) need forum admin to help, I can not post any reply to below topic. Not sure if it's a website bug.

2) answer to below topic:

  

Did the calibration finished properly in the design?

> Yes, it's running on actual demo board, and the local_init_done = high 

What is the test_start signal does?

> It's not related to ddr2. It's only a signal for my application after ddr2 ready.

Is there a waitrequest signal in your design?

> not used. 

How do you perform the write and read transaction?

> you can look at below picture by ddr2 controller local interface, such as local_address, local_wdata, local_write_req, local_burstbegin.....  I am using the exact sequence documented in intel guideline.

 

3) correct one information: ddr2 part number is MT47H32M16CC-3

 

https://community.intel.com/t5/Programmable-Devices/problem-using-altmemphy-to-read-ddr2/m-p/1382338

XQSHEN_0-1652222818163.png

 

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AdzimZM_Intel
Employee
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Hello,


The local_ready still been asserted in the write transaction which I think the transaction still not be done.

You can enable the ECC in the EMIF IP setting to see if there is data error in your design.


Thanks.


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AdzimZM_Intel
Employee
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We do not receive any response from you to the previous reply that I have provided. This thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you.


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