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Altera_Forum
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17 years ago

Phy Input Clock DP83848C PHYTER

Hi , I am using Altera CYCLONE III ,I have implemented NIOS II + Onchip memory + SSRAM + Custom MAC (RMII Mode).I want to configure the PHY to RMII Mode.For that I think I have to connect 50 M...
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Altera_Forum
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17 years ago

Hi ,

I looked at the schematic.The X1 Pin is connected to a crystal oscillator .

I am attaching the schematic here.Refer Page 3.

I want to know whether we have options to configure the Crystal oscillator to generate a 50MHz clock or externally we have to connect 50MHz clock.If So I don't know how to make the things happen ?

I am attaching the PHY Document also . There is one particular register in PHY to configure in RMII Mode [Register No 0x17,]If I configure it to RMII Mode , whether 50 MHz clock will be generated ? If this happens No need to configure the crystal oscillator for 50 MHz / external clock connection .