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MPC5777C-416DS FEC RMII Signal CLK_50MHZ

Question asked by Martin Stanzel on Feb 2, 2018
Latest reply on Feb 7, 2018 by Martin Kovar

Dear NXP,

 

I have a question considering signal CLK_50MHZ necessary for using FEC in RMII mode.

 

According to MPC5777C EVB User Guide (Rev. 0, 08/2015) Pins 2&3 on Jumper J524 on MPC5777C-416DS must be connected in order to generate signal CLK_50MHZ.

 

 

In my setup this configuration does not work, the output signal CLK_50MHZ stays low instead of providing a 50MHZ clock. Is this jumper setting an error in the User Guide or is there a problem with my setup? Can you specify component "Y2"?

 

Thanks,

Stanzel

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