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Frequent questions

  • [FAQ] DP83867E: How to force 10/100/1000 Mbps speed in Ethernet PHYs?

    Part Number: DP83867E Other Parts Discussed in Thread: USB-2-MDIO To force a specific speed, auto-negotiation is left enabled while disabling advertisements for all non-desired speeds. The scripts to do this in the USB-2-MDIO interface for the DP83867…

  • [FAQ] How to read and write Ethernet PHY registers using a Linux terminal?

    There are several different tools available in a Linux environment to read and write registers on a TI PHY. Several of these options are listed below. MII read: This is the only command which can and must be used in U-boot. Stop the autoboot process as…

  • [FAQ] DP83TC812S-Q1: How to disable 25MHz clock on clkout pin?

    Part Number: DP83TC812S-Q1 For DP83TC812S/R if clkout pin is not being used to provide a clock signal to another component, then it is recommended to shut down this clock output and reduce its impact on EM emissions. Clkout's output can be made static…

  • [FAQ] Which conformal coating is recommended for Ethernet PHY products?

    TI does not have a recommendation for any specific conformal coat or underfill product. In some temperature ranges these materials can be detrimental if the conformal coating or underfill product has a mismatched CTE vs. solder joint (Z axis). This mismatch…

  • [FAQ] DP83867IR: How to test the link-quality using DP83867's BIST and status registers?

    Part Number: DP83867IR DP83867 PHY (and other TI industrial and automotive PHYs) have the capability to : 1. Generate the packetized data 2. Capture the number of frames received 3. Capture the number of frames received with errors. These parameters can…

  • [FAQ] DP83TD510E: How to check throughput without depending upon MAC?

    Part Number: DP83TD510E DP83TD510E PHY (and other TI industrial and automotive PHYs) have the capability to : 1. Generate the packetized data 2. Capture the number of frames received 3. Capture the number of frames received with errors. These parameters…

  • [FAQ] DP83867E: How do I choose magnetics for my industrial PHY?

    Part Number: DP83867E There are 5 key parameters to look out for when selecting magnetics: Magnetic type (specifically for integrated RJ-45/Magnetic component) Can the recommended MDI configuration still be met with this component? Turns ratio Ideally…

  • [FAQ] TLK2711-SP: Eye Mask Recommendations

    Part Number: TLK2711-SP There have been some questions regarding the TLK2711-SP eye mask related to the following E2E thread, so I am hoping to clarify them in this post. TLK2711-SP: Is there an EYE diagram mask definition available? - Space & High Reliability…

  • [FAQ] DS90UH941AS-Q1: How to configure FPD-Link III 94x audio

    Part Number: DS90UH941AS-Q1 How do I configure audio for FPD-Link III 94x devices?

  • [FAQ] DP83826E: In enhanced mode, how does DP83826 strapping work?

    Part Number: DP83826E When configuring DP83826 in Enhanced Mode, please consult the following flowchart to understand how the different strap pins configure the PHY into various modes.

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