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TDA4VM RMII question.
1,REF CLK pin conflict.
2,How to connect REF CLK pin of TDA4 to RMII phy? How many RMII can be used? Or just only one can be used?
The details are as follows.
1,REF CLK pin confict in TI PIN MUX TOOL, unless not choose REF CLK(AD18), as shown in the figure below.
2,Only one REF CLK(AD18) is in TDA4, but every RMII phy(like TJA1102) has one REF CLK output, how to connect? Or is there only one RMII phy that works?
Thanks a lot.
REF_CLK pin conflict is solved in PIN MUX TOOLS.
Please answer my other questions in the same quote.
1, Can multi RMII phys be used? Or is only one RMII used?
2, If multi RMII phys can be used, every RMII phy has one REF_CLK, How to connect the REF_CLK signal in TDA4?
Hi, Hui-Liu:
1, Can multi RMII phys be used? Or is only one RMII used?
Ans: Multiple RMII PHYs can be used.
2, If multi RMII phys can be used, every RMII phy has one REF_CLK, How to connect the REF_CLK signal in TDA4?
Ans: TDA4VM REF_CLKOUT can be used to drive two RMII PHYs (connect directly to the REF_CLK of 2 PHYs). If more than 2 PHYs will be used, clock buffer will be needed.
Thanks.