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TDA4VM: TDA4Vmid PCIe routing;

Franz Schmid
Intellectual 1865 points

Part Number: TDA4VM

Team,

is it possible to change polarity and lanes on TDA4V PCIe? The purpose is to simplify the layout.

Please advise where to find related information.

Kind regards,

Franz

  • 0
    TI__Genius 17176 points

    Per the PCIe spec, "Support for Lane Polarity Inversion is required on all PCI Express Receivers across all Lanes independently."  The TDA4V PCIe port is compliant to the spec.

    However, Lane Reversal is an optional feature in the PCIe spec.  While support for this feature is not called out at as a high level feature in the device TRM, it is supported and reported in the LRS bit of the PCIE_CORE_LM_I_NEGOTIATED_LANE_MAP_REG Register shown in the TRM.