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Hi,
We are currently using the DP83825 in our design and have started the proof of concept. I can read and write PHY registers through the STM32H573I-DK, but I am unable to read data in the STM32 MAC. The link status of the PHY is always up. Could you please help me with this issue? We have followed the connections between the STM32H573I-DK and the DP83825 EVM kit.
thanks
Ravi.ch
Hi ,
We are using the DP83825 as a master, and we have a question regarding the configuration of the 50MHzOut/LED2 pin during the bootstrap phase. It is active high at bootstrap time, and we understand this configures pin 20 as RX_DV in RMII mode, which is useful in repeater mode. Could this configuration cause any issues with receiving data?
Hi Ravich,
The link status of the PHY is always up
Just to confirm, are you seeing a valid link established? This can be checked using the LED_0 pin or through the Link_Status register:
This would suggest the MDI interface is ok. Do you notice any activity on the LED (blinking)? This happens when there is activity on the interface.
It is active high at bootstrap time, and we understand this configures pin 20 as RX_DV in RMII mode,
RX_DV is made to be used for repeater mode. Are you able to configure pin 20 as CRS_DV by keeping LED2 low during initialization?
It would also be good to check that your RMII signal is meeting the timings described in the datasheet.
Best,
Shane
