Arria 10 GX , Cyclone 10 GX transceiver phy compatibility

Hi,

Thanks for your update regarding the A10 rx_is_lockedtodata = 1 when the SMA is connected. Based on this, I presume that rx_cal_busy = 0 and rx_is_lockedtoref may be toggling, which suggests that the A10 RX CDR has reached the LTD (Lock to Data) state.

To assist further, I’d like to check on a few points:

Debug Suggestions:

1. Fixed Pattern Transmission

Have you had a chance to transmit a fixed pattern (e.g., 0xBC) from the C10 TX to the A10 RX? Using a fixed pattern can simplify debugging and data monitoring, and is generally less susceptible to noise compared to PRBS patterns.

2. Eye Diagram Inspection

Would you be able to use an oscilloscope to inspect the eye diagram as close as possible to the A10 RX package balls? This might help identify any signal anomalies.

Additional Checks (for completeness only, I believe you have checked these):

1. Are the reconfig_clk, refclk, and CLKUSR clocks sourced directly from free-running oscillators?

2. Please double-check the clock frequencies and signal integrity for any irregularities.

3. Also, verify the power supplies—especially those related to the transceiver—for any potential issues.

Let me know if you have any concerns or need further assistance. Thank you!

Best regards,

Chee Pin