How to output the scrambled idle pattern for ethernet compliance testing?

Question

We are using the W5100 in one of our designs. For ethernet compliance testing I am supposed to output a “scrambled idle pattern”. From a different post I understand that the W5500 will create this pattern automatically when connected to the test equipment. What do I have to do so that the W5100 chip will create this pattern? Thank you Best regards Holger

Eugeny · Answer

waldhol: What do I have to do so that the W5100 chip will create this pattern? Take the scope and look at the waveforms. To my knowledge you do not have access to such functions through regular interface.