AnsweredAssumed Answered

Lan8720 interrupt pin

Question asked by toth.janos on Mar 3, 2014
Latest reply on Mar 3, 2014 by toth.janos
Hello everybody.
I want to use lan8720 ethernet interface with the interrupt pin. But the interrupt pin is the same with the refclk out. So if I use anexternal 25Mhz clock, or the stm32f4 mco pin, need to connect the reclk to the controller RMII_REF_CLK pin.
What is the best way to use IT pin? Use an external 50MHz clock for lan8720 or use this clock for the controller too. In the stm32f4xx datasheet figure 91, an 50Mhz use for this, but in the clock configuration tool max HSE value is 26Mhz.