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TI Home » TI E2E Community » Support Forums » Interface » Industrial Interface » Industrial Interface Forum » DP83848K- Auto Negotiation
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DP83848K- Auto Negotiation

This question is answered
Letice Kubert
Posted by Letice Kubert
on Apr 23 2012 13:54 PM
Intellectual1040 points

Dear all,

Could you please tell me if there is any way that the auto negotiation can be desabled via an external pin? Maybe the strapp?

How to do that?

 

Tks and Rgds,
Letice

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  • Patrick O'Farrell
    Posted by Patrick O'Farrell
    on Apr 24 2012 07:09 AM
    Verified Answer
    Verified by Thomas Kugelstadt
    Genius9680 points

    Letice,

    Auto-negotiation is enabled by default on the DP83848K.  Disabling auto-negotiation requires a register write to clear the Auto-Negotiation Enable bit in the Basic Mode Control Register (BMCR), register address 0x00.

    Patrick

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  • Patrick O'Farrell
    Posted by Patrick O'Farrell
    on Apr 27 2012 16:05 PM
    Genius9680 points

    Letice,

    Disabling auto-negotiation using external straps can be accomplished using other devices in our Ethernet portfolio.  The following devices provide this functionality and, like the DP83848K, are in the industrial temperature range (-40C to 85C):

    • DP83848I
    • DP83620
    • TLK100
    • TLK110

    Other options are available with additional features (IEEE 1588 hardware support) or additional ports, but the options listed above are the closest to the DP83848K in functionality while still supporting the ability to disable auto-negotiation using external straps.

    Patrick

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