Hi ArunkumarSC,
Thank you for your detailed report regarding the boot failures on your Cyclone V and DDR3 cards.
Based on the Cyclone V Device Handbook and your observations, please review and provide the following to help us pinpoint the issue:
Configuration Signals:
- Monitor nCONFIG, nSTATUS, and CONF_DONE pins during power-up. Are there differences between working and non-working cards?
- Confirm correct MSEL settings and configuration mode.
Power Supplies:
- Ensure all FPGA power rails ramp up within spec and in the correct sequence (per handbook recommendations).
- Share oscilloscope captures if possible.
DDR3 Interface:
- Check that DDR3 initialization and PHY calibration complete successfully.
- Confirm correct pinout, I/O voltages, and termination.
Programming & Assembly:
- Verify the same FPGA image is used on all cards.
- Consider cross-swapping FPGA/DDR3 between working and failed units to isolate the fault.
- Inspect for subtle soldering issues (even if X-ray looks OK).
JTAG Access:
- Can you connect to failed cards via JTAG for further diagnosis?
Please provide your findings from the above. If you have oscilloscope traces or error/status codes, sharing them will help accelerate resolution.
Thank you for your cooperation, looking forward to your update.
Best regards,
Fakhrul
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