Ethernet RMII Reference clock

[ub786]

Hi,

Is it possible to use GREFCLK instead of REFCLKA for RMII interface (TC38xx)?

P11.5 instead of P11.12?

Thank you for your help

BR

[Di_W · Accepted solution]

Hi ub786,

From the user manual TC3xx and TS appx, you can find EPR field 100b leads that RMII is selected and an internal predivider divides the clock clk_rmii_i from pin ETHRXC by 2 or 20 and provides it to the internal signals clk_tx_i and clk_rx_i. And clk_rmii_i is 50-MHz clock used by the RMII from PHY.