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Frequent questions

  • [FAQ] DP83TC812S-Q1: My PHY won't link up

    Part Number: DP83TC812S-Q1 Link status is shown in register 0x1 bit[2]. Link failing to show as up can be caused by many issues. Please see the following debug guide which walks through several of the possible causes and fixes. Specifically see section…

  • [FAQ] DP83TC813S-Q1: How to output LED1 signal on pin 14

    Part Number: DP83TC813S-Q1 By default, pin 14 of the DP83TC813 will output the CLKOUT signal. To instead have the LED1 signal on pin 14, write to the below registers. 0x045F = 0x000F 0x0452 = 0x0000 0x0451 = 0x0009

  • [FAQ] DP83TC812S-Q1: How to to adjust slew rate of MAC IOs

    Part Number: DP83TC812S-Q1 Reducing the slew rate of MAC interface IOs can provide improvement in EMC emissions for some frequencies. This can be done using register 0x456. 0x456 bits [5] and [0] control the impedance of the RX and TX MAC interface…

  • [FAQ] Announcing New GUI Application for Ethernet EVM & PHY Evaluation

    All, Excited to share the initial release of DIEP (Debug Interface for Ethernet PHYs). The Windows GUI is designed to simplify the process for PHY-level configuration and debug with register access. Using a valid USB connection to an on-board MSP…

  • [FAQ] SN65DSI84: Swapping between DSI 83/84/85

    Part Number: SN65DSI84 Other Parts Discussed in Thread: SN65DSI83 , , SN65DSI85 Swapping DSI 83/84/85 FAQ Before we begin here is a brief overview of each part and its capabilities: SN65DSI83: SINGLE channel MIPI DSI to SINGLE channel LVDS Bridge…

  • [FAQ] TDP1204: What is the difference between the TDP1204 and the TMDS1204 HDMI 2.1 redrivers?

    Part Number: TDP1204 Other Parts Discussed in Thread: TMDS1204 When choosing to design in either TDP1204 and TMDS1204, the system designer should consider the differences between the two HDMI 2.1 redrivers. This thread highlights the differences and provides…

  • [FAQ] DP83869HM: SGMII Output Differential Voltage Clarification

    Part Number: DP83869HM The SGMII Output spec is slightly ambiguous, the purpose of this FAQ is to clear up the terminology. Our data sheet has the following spec: SGMII OUTPUT Min Typ Max Unit Output Differential Voltage …

  • [FAQ] How to Confirm Ethernet PHY Strapping

    Other Parts Discussed in Thread: DP83869 Our Ethernet PHYs have Hardware Bootstraps that allow the PHY to be configured without the need for register access and also set the PHY ID. Either one of these being mismatched can cause issues, e.g. PHY is configured…

  • [FAQ] DP83826I: How do I debug a PHY issue within an EtherCAT network?

    Part Number: DP83826I 3644.How to debug PHY level issues in EtherCAT networks.pdf

  • [FAQ] 10base-T and 10 base-Te difference

    What is the difference between 10Base-T and 10Base-Te?

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