Does the tsec_gtx_clk125 pin on the MPC8315 need to be grounded or just leave unconnected if it is not used?

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Does the tsec_gtx_clk125 pin on the MPC8315 need to be grounded or just leave unconnected if it is not used?

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kennethhuang
Contributor I


I don't use gigabit Ethernet.  Do I leave the tsec_gtx_clk125 pin unconnected or tie it to ground or VCC?  The databook does not mention anything.

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ufedor
NXP Employee
NXP Employee

Connect the GTX_CLK125 through 1 - 4.7 kOhm to GND.

Reference:

AN3438 - MPC8315 Design Checklist:

http://cache.nxp.com/files/32bit/doc/app_note/AN3438.pdf

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