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How can I find the PHY address of LAN8720

kashubadmitry
Associate II

‎2016-11-07 10:33 PM

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!
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2 REPLIES 2
kashubadmitry
Associate II

‎2016-11-08 12:23 AM

Posted on November 08, 2016 at 09:23

I solve the problem!

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matteo23
Associate II

‎2016-11-09 11:29 PM

Posted on November 10, 2016 at 08:29

may you tell us how u did it?

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