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i.mx rt1020-evk:Why configure the pin GPIO1-4 in the enet driver ?

Question asked by qin cao on Apr 25, 2020
Latest reply on Apr 27, 2020 by Mark Butcher

I found a piece of code that confused me when I was using enet driver on the rt1020-evk.ALL SDKS about the enet have the following code:

 

GPIO_WritePinOutput(GPIO1, 22, 1);
GPIO_WritePinOutput(GPIO1, 4, 0);
delay();
GPIO_WritePinOutput(GPIO1, 4, 1);

 

what confuses me is that GPIO1-4 has nothing to do with phy chip (KSZ8081RNB).I hope you can help me solve my confusion.

 

Thanks!

 

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