ogulcan123
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Hi all,
I'm using LAN8720A ethernet chip in my design with an STM32F4 MCU.
Although I don't connect any cable, the link LED is on.
The chip seems to draw normal current and doesn't heat. Besides, I didn't get any clue if the MCU and ethernet chip communicates or not, so I doubt it's working.
So what does it mean if this LED is always on without a link? Any idea on the debugging steps for ethernet chips generally or specifically?
I'm using LAN8720A ethernet chip in my design with an STM32F4 MCU.
Although I don't connect any cable, the link LED is on.
The chip seems to draw normal current and doesn't heat. Besides, I didn't get any clue if the MCU and ethernet chip communicates or not, so I doubt it's working.
So what does it mean if this LED is always on without a link? Any idea on the debugging steps for ethernet chips generally or specifically?