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host's avatar
host
Icon for Occasional Contributor rankOccasional Contributor
8 months ago
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Configuring Arria V Transceiver PLL for 2.5G Ethernet

Hello, I want to use the Multi-rate Ethernet IP at 2.5G on an Arria V device The datasheet mentions that rx_clkout will be derived from tx_serial_clk: And it seems like I’ll need to us...
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  • paveetirrasrie_Altera's avatar
    paveetirrasrie_Altera
    7 months ago

    Hello,


    After checking on this, here's the connection guideline:

    • The proper connections are to connect "fboutclk" to "pll_fbclk" and to leave "hclk" open.

    Hope I've answered your query.


    Regard,

    Pavee



paveetirrasrie_Altera's avatar
paveetirrasrie_Altera
Icon for Frequent Contributor rankFrequent Contributor
7 months ago

Here's the connection required to operates PLL for 2.5G


Serial clock from transceiver PLLs.

• 2.5GbE: Connect bit [0] to the transceiver PLL. This clock operates at 1562.5 MHz

• 1GbE: Connect bit [1] to the transceiver PLL. This clock operates at 625 MHz.

• 10GbE: Connect bit [2] to the transceiver PLL. This clock operates at 5156.25 MHz.


Kindly refer to https://www.intel.com/content/www/us/en/docs/programmable/683171/current/clock-and-reset-signals.html for more detailed explanation.


Regards,

Pavee