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DP83867IS: Comparing Interfaces and 10/100/1000 Speeds / Negotiation

Darren (FAE)
Expert 5483 points

Part Number: DP83867IS

Devices under consideration for a design

10/100: DP83822IRHBR
10/100/1000: DP83867ISRGZR

[1]
Within the Interface capability for PHYs, there are MII, RMII, RGMII and SGMII. 
Could I get a table of each Interface type paired with Ethernet Speed please? (10BASE-T, 100BASE-TX, 1000BASE-T, etc)
Just looking at twisted pair here, and not single-pair (T1).

 [2]
I need to provide information on the selection sequence for MII, RMII, RGMII and SGMII.
・The result of Auto-Negotiation is stored in Auto-Negotiation Link Partner Ability Register (ANLPAR)?
・The MAC reads this, and decides the interface to use...so the MAC decides...?

If you know of detailed literature on negotiation and establishing a link for each Interface/Speed pair, that would be great...

  • 0
    TI__Expert 3727 points

    Hi Darren,

    TI has a lot of application notes, and collateral up on the SharePoint, as well ti.com with a lot of great material. Ethernet PHY's are complex mixed signal devices so it will be difficult to give an overview without some background information. Please look at the following FAQ for some information regarding the different MAC interfaces, and their respective capabilities. 

    https://e2e.ti.com/blogs_/b/analogwire/posts/simpliphy-your-ethernet-design-part-1-ethernet-phy-basics-and-the-selection-process

    Best,

    Alon

  • 0 in reply to Alon Kopelman
    TI__Expert 5483 points

    HI Alon,

    I looked at the page; the info I was hoping for was a combination of Table 1 and Table 2, with an explanation of what Interface goes with which Mode.
    (I know -T1 is SPE, and because of minimalistic cabling it needs the reduced interface)

    On the sharepoint I saw the "HW Design and Support" Tab - so I'll be looking through that. Is the above info in there somewhere...?

    Regards,

    Darren

  • 0 in reply to Darren (FAE)
    TI__Expert 3727 points

    Hi Darren,

    Please use an internal E2E forum next time, HW Design and Support tab is unlikely to have what you are looking for, although there are some trainings that could interest you (Ethernet FAE Training 2019). 

    Because these are IEEE standards, most of the information you are looking for is on various wikis. 

    Table 1 and Table 2 are not combined because they describing different things. When choosing a PHY you use both tables, and the flowchart at the bottom to determine your needs. 

    If you have more specific questions, I am happy to help. 

    Best,

    Alon