Honored Contributor
Honored ContributorThank you for all the support and help!
On the 10Gbps MAC Megacore User Guide (page 148), it is written that the Recofiguration is not necessary for Stratix IV GX Devices. Unfortunately I don't have any SFP+ interfaces available here (my supervisor haven't bought it yet), that's why I'm trying to loopback the XAUI interface to test it. Isn't there any way of doing this with the HSMC Loopback Module? Thank you once more! --- Quote Start --- Yes, you need the reconfiguration controller because the offset cancellation must be done. Look at my attached screenshots. They show the settings for the LPMs, which I use actually on a custom hardware. For the devkit it should be the same. The analog options in XAUI Phy may vary. xaui_lpms.jpg show the connection between reconfig controller and phy. The signal reconfig_fromgxb is splitted between the 2 phys. (described in Stratix IV Device Handbook Volume 2: Transceivers, Feb. 2011, p. 5-77) reconfig_clk.jpg shows the constraints for the clock to the reconfig controller. Use an appropriate clock on the devkit. The connection from xgmii_rx_clk to xgmii_tx_clk is correct. I use this clock to drive the control logic for send and receive data over the XAUI channels. I do not use a MAC (10GE) just the low level XAUI protocol. best regards Jens --- Quote End ---
