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Altera_Forum
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17 years ago

GMII <-> MII bridge in MAX II CPLD ?

Hi Folks, In my board, I would like to use GMII to MII bridge in MAX II CPLD. But I don't have idea of > Whether it can be used in MAX II CPLD (LE utilization and device electrical characteri...
Altera_Forum's avatar
Altera_Forum
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17 years ago

OK, RGMII to GMII....Please ignore this post!!!

Hi,

I don't see any reason why a GMII to MII interface could not be implemeneted in a MAX II part.

The CPLD should be able to be clocked fast enough (MII runs at 25MHz, GMII runs at 125MHz for Gbit ot 25Mhz for 100M) I assume you will run the GMII side at 10/100M rates to remove the need for traffic shaping/buffering in the CPLD in the GMII to MII direction)

The MZX II i/o should be suitable for both MII and GMII (Spec'ed as 3.3V LVTTL if memory serves)