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EEnam's avatar
EEnam
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6 years ago

How to use 4x10g phy as bare 40g phy without MAC ip

Hi, I successfully start a 10g PHY ip in way that i can receive the packet. Now I’ve been trying to configure 40g PHY without mac just to get any changes of data at IP output and I can’t achieve that...
Deshi_Intel's avatar
Deshi_Intel
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6 years ago
HI, So basically what you are saying is the XGMII_rx_data of 0x0100009C is the direct output from transceiver RX channel without additional data processing, right ? I looked at the sim waveform btw 10G and 40G, the only obvious difference that I found is just on the xgmii_tx_control setting value. It's difference btw 10G and 40G. Have you look at it ? Thanks. Regards, dlim
EEnam's avatar
EEnam
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6 years ago

Hi dlim.

Yes, you are right, “qsfp” signals in screen above is direct output from transceiver and rx-tx is looped in logic. I modify arrays names and control signals assignments for better clarity.

Only thing that is strange to me is that control signals is indicating data transfer (https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/arria-10/ug_arria10_xcvr_phy.pdf page 83, Table 60) when I think this is control word (http://www.ieee802.org/3/ak/public/jan03/WPcls48_1_0.pdf Table 48–2).

Apart from that, the control and data signals are just looped so it should work anyway.