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About register information of DP83865

Satoshi
Guru 19645 points
Other Parts Discussed in Thread: DP83865

is there information of resister address: 0x1C0?

For example, datasheet page 49 written in 0x1C0.1 (3.20 10BASE-T Half Duplex Loopback),

but I didn't find detailed information of these resister address.

Best regards,

Satoshi

  • 0
    TI__Mastermind 31600 points
    Satoshi,

    I changed the title of this post from "resister" to "register" so that other forum users searching on this topic will be find this post.

    Patrick
  • 0 in reply to Patrick OFarrell
    TI__Mastermind 31600 points
    Satoshi,

    Some functions of the DP83865 require accessing the Expanded Memory Space. Details on accessing the Expanded Memory Space are in section 3.1 of the datasheet.

    Three of the functions requiring access of the Expanded Memory Space utilize register address 0x1C0. These three functions are Gigabit Speed Fallback, Gigabit Retry Forced Link, and 10BASE-T HDX loopback. The relevant bits of register 0x1C0 are described in the sections of the datasheet describing these three functions.

    Patrick
  • 0 in reply to Patrick OFarrell
    Guru 19645 points
    Patrick-san

    Thank you for reply and correction.

    How is bit number assigned is 0x1E resister map?
    I'm happy if there is information of register description.
    (For example, section 2.3 of the datasheet)

    Best regards,
    Satoshi
  • 0 in reply to Satoshi
    Guru 19645 points
    Not any more of those ?
  • 0 in reply to Satoshi
    TI__Mastermind 31600 points
    Satoshi,

    Register 0x1E is used as an address pointer. The register value for the register that is being accessed is entered directly into register 0x1E as described in the datasheet. In other words, when accessing register 0x1C0, the value 0x1C0 is written to register 0x1E.

    I believe your second question is where or not there are more configuration options that utilize the expanded memory space. The only options that fit that description are identified in section 3.1, "Accessing Expanded Memory Space". As you can see, only a small number of configuration requires accessing the expanded memory space.

    Patrick