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DP83TC813R-Q1: TDR test steps

ahmed abdelazim
Prodigy 171 points
Part Number: DP83TC813R-Q1

Tool/software:

Hello TI team,

For ethernet PHY chip "DP83TC813R-Q1" for TDR test mentioned in "Application Note DP83TC812, DP83TC813, and DP83TC814: Configuring for Open Alliance Specification Compliance" ,

For test Step 2 "TDR configuration: Pre-run" registers "Reg[0x0523]", "Reg[0x0827]"and "Reg[0x0831]",

Those 3 above stated registers not exist in Data sheet "DP83TC813R-Q1_ SNLS676 – MAY 2022"  ,

so by this mean is it missed in data sheet , or those test steps needed to be updated ?

  • 0
    TI__Mastermind 18665 points

    Hi Ahmed,

    These registers in the TDR procedure are correct, they are just not described in the datasheet. There are hundreds of registers inside of the PHY. Many low-level registers are left out of the datasheet because their operation is difficult to explain and customers are likely to be confused if they try modifying them on their own, outside of official procedures.

    Best,

    Evan Su