NE64 Ethernet at bus clock 16MHz

[Jaya]

I am trying to use NE64 inbuilt ethernet at bus clock 16MHz. I have a TCP/IP stack working at 25MHz bus clock and internal flash. But if i reduce the busclock to 16Mhz and set MDCSEL to generate MDC freq less than 2.5MHz, stuff does not work. Ultimately i want to use external RAM and ethernet at 16MHz later. Am I missing any other configuration needed to be modified? Any one had done EMAC workign at 16MHz bus clock? pls help me out.

Thanks,

Jayaraman

[mjbcswitzerland]

Hi Jaya

The internal PHY in the NE64 requires a 25MHz crystal (see chapter 12 of the users' manual).

If you use a different bus speed I think that it will only be possible by also using an external PHY because the internal one will not be able to operate correctly.

Regards

Mark

[Jaya]

Thanks Mark.Will get back with results!