How can I find the PHY address of LAN8720

kashubadmitry · ‎2016-11-07

Posted on November 08, 2016 at 07:33

Hi!

I have STM32F4discovery and PHY device LAAN8720. I want to configure the register with address = 0b00000 of the LAN8720.

When I set PHY address = 0b00000 and after write operation of data 0x2100 I did read operation, but the read data was 0x0000. I connected oscilloscope to pin MDIO and saw right impulses in write operation and low level in data field during read operation. Maybe the PHY address is wrong.

How can I find the PHY address of LAN8720?

Thank You!

kashubadmitry · ‎2016-11-08

Posted on November 08, 2016 at 09:23

I solve the problem!

matteo23 · ‎2016-11-09

Posted on November 10, 2016 at 08:29

may you tell us how u did it?