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Altera_Forum's avatar
Altera_Forum
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11 years ago

Tse mac

I am using ALTERA tripple speed ethernet ip core.My question is:-If rx_section_empty has crossed its threshold value and not coming down,will TSE MAC keep on sending pause frames ?????
Altera_Forum's avatar
Altera_Forum
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11 years ago

Did you build the MAC with internal FIFOs? If yes then I believe the MAC will continue to send XOFF pause frames spaced according to the holdoff_quant register. But I could be wrong about that.

I use the MAC with external FIFOs and use the xoff_gen and xon_gen pins to control pause frames manually. I monitor the Rx FIFO level myself and maintain my own timer for when to send another XOFF frame. I personally like having that control, plus easier to debug if things aren't working.