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Device: EP4CE22F17C8
Memeory: Micron MT47H64M8CB-3
IP: altmemphy DDR2
Burst count = 16
I met a problem to read out data using altmemphy.
1) if I start with write operation ddr2 at first, after finished; then try to read data out of memory, then I can never get the data, the local_rdata_valid is always low.
2) if I don't do any write operation, try to read the data out of memory, I can get it successfully.
I don't see any problem with my write process.
What's wrong?
Picture : write + read
Picture only read
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Hello,
Did the calibration finished properly in the design?
What is the test_start signal does?
Is there a waitrequest signal in your design?
How do you perform the write and read transaction?
Thanks,
Adzim
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We do not receive any response from you to the previous question/reply/answer 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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