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Implement a distributed synchronous ethernet network using 100BaseFx phy

Hemant Ghayal
Intellectual 265 points
Other Parts Discussed in Thread: DP83620, DP83640, DP83630

We plan to implement a distributed synchronous ethernet network using 100BaseFx phy. Is it possible to achieve this by programming all the phy registers only through MDIO?Our application does not allow us to use the ethernet frame mechanisms between MAC and phy for programming registers and capturing events etc. However it may be possible to communicate messages between master and slave clocking units by some other means and program/read their phy registers using MDIO.

Also, which TI phys can be used for such application as master as well as slaves?

Regards 

  • 0
    TI__Mastermind 31600 points

    The DP83640 / DP83630 / DP83620 devices support 100Base-FX fiber operation.  These devices also support the use of Phy Control Frames (PCF) and Phy Status Frames (PSF) as an alternate method for accessing registers.  The use of PCF and PSF is not required for register access.  The default method for register access is via the MDIO register interface.  All registers can be read via MDIO. 

    Note that the DP836x0 devices also allow some configuration to be accomplished via external strap resistors.  Fiber enable is one of the modes configurable via straps.

    Patrick