Sir, I would like to design a SFPDP module that receive parallel data from F/o module . This is a part of a recorder. My question is how to proceed with Stratix IV board? Can i use ALTGX Transceiver for that? If so please do mention challenges.

Hi,

Thanks for your elaboration. Please see my responses as following:

1. Regarding the offset cancelllation, yes, your understanding is correct, you would need to connect a ALT_RECONFIG instance to the ALTGX instance in order for the power up offset cancellation to work correctly.

2. The offset cancellation will auto take place one time during device power up. You need to ensure free-running refclk to the ALTGX and reconfig_clk ALT_RECONFIG so that the offset cancellation can be completed successfully.

3. Since you do not require dynamic reconfiguration in your application, you can ignore the dynamic reconfiguration part.

4. I understand that you are running 4 channels and perform test in hardware. To facilitate the debugging and bring up, I would recommend you to start with simple one channel loopback design in Modelsim simulation first. This would be helpful to isolate any functional related issue before moving on to hardware.

5. After the 1 channel design is able to loopback correctly, you can increase to 4 channels per your design and verify again in simulation. Once you are done with simulation, you may then port over to hardware to start validation.

Please feel free to let me know if you encounter any issue during the simulation with 1 channel design.

Please let me know if there is any concern. Thank you.

Best regards,

Chee Pin