JAJSK47D August   2020  – December 2023 DP83TD510E

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Pin Configuration and Functions
    1.     Pin Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Timing Diagrams
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Auto-Negotiation (Speed Selection)
      2. 6.3.2  Repeater Mode
      3. 6.3.3  Media Converter
      4. 6.3.4  Clock Output
      5. 6.3.5  Media Independent Interface (MII)
      6. 6.3.6  Reduced Media Independent Interface (RMII)
      7. 6.3.7  RMII Low Power 5-MHz Mode
      8. 6.3.8  RGMII Interface
      9. 6.3.9  Serial Management Interface
      10. 6.3.10 Extended Register Space Access
        1. 6.3.10.1 Read (No Post Increment) Operation
        2. 6.3.10.2 Read (Post Increment) Operation
        3. 6.3.10.3 Write (No Post Increment) Operation
        4. 6.3.10.4 Write (Post Increment) Operation
      11. 6.3.11 Loopback Modes
        1. 6.3.11.1 MII Loopback
        2. 6.3.11.2 PCS Loopback
        3. 6.3.11.3 Digital Loopback
        4. 6.3.11.4 Analog Loopback
        5. 6.3.11.5 Far-End (Reverse) Loopback
      12. 6.3.12 BIST Configurations
      13. 6.3.13 Cable Diagnostics
        1. 6.3.13.1 TDR
        2. 6.3.13.2 Fast Link Down Functionality
    4. 6.4 Device Functional Modes
      1. 6.4.1 Straps Configuration
        1. 6.4.1.1 Straps for PHY Address
    5. 6.5 Programming
    6. 6.6 MMD Register Address Map
    7. 6.7 DP83TD510E Registers
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Termination Circuit
        1. 7.2.1.1 Termination Circuit for Intrinsic Safe Applications
        2. 7.2.1.2 Components Range for Power Coupling/Decoupling
        3. 7.2.1.3 Termination Circuit for Non-Intrinsic Safe Applications
        4. 7.2.1.4 CMC Specifications
      2. 7.2.2 Design Requirements
        1. 7.2.2.1 Clock Requirements
          1. 7.2.2.1.1 Oscillator
          2. 7.2.2.1.2 Crystal
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Signal Traces
        2. 7.4.1.2 Return Path
        3. 7.4.1.3 Metal Pour
        4. 7.4.1.4 PCB Layer Stacking
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
    2. 8.2 サポート・リソース
    3. 8.3 Trademarks
    4. 8.4 静電気放電に関する注意事項
    5. 8.5 用語集
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

6.3.9 Serial Management Interface

The Serial Management Interface provides access to the DP83TD510E internal register space for status information and configuration. The SMI is compatible with IEEE 802.3 clause 22 and clause 45. The implemented register set consists of the registers required by IEEE 802.3 plus several others to provide additional visibility and controllability of the DP83TD510E.

The SMI includes the management clock (MDC) and the management input/output data pin (MDIO). MDC is sourced by the external management entity, also called Station (STA), and can run at a maximum clock rate of 1.75 MHz. MDC is not expected to be continuous and can be turned off by the external management entity when the bus is idle.

MDIO is sourced by the external management entity and by the PHY. The data on the MDIO pin is latched on the rising edge of the MDC. The MDIO pin requires a pullup resistor (2.2 kΩ) which pulls MDIO high during IDLE and turnaround.

Up to 16 PHYs can share a common SMI bus. To distinguish between the PHYs, during power up or hardware reset, the DP83TD510E latches the Phy_Address[3:0] configuration pins to determine its address.

The management entity must not start an SMI transaction in the first cycle after power up or hardware reset, it shall wait for powerup and reset to complete. Refer to timing section for power up and reset time. In normal MDIO transactions, the register address is taken directly from the management-frame reg_addr field, thus allowing direct access to 32 16-bit registers (including those defined in IEEE 802.3 and vendor specific). The data field is used for both reading and writing. The Start code is indicated by a <01> pattern. This pattern ensures that the MDIO line transitions from the default idle line state. Turnaround is defined as an idle bit time inserted between the Register Address field and the Data field. To avoid contention during a read transaction, no device may actively drive the MDIO signal during the first bit of turnaround. The addressed DP83TD510E drives the MDIO with a zero for the second bit of turnaround and follows this with the required data.

For write transactions, the station-management entity writes data to the addressed DP83TD510E, thus eliminating the requirement for MDIO Turnaround. The turnaround time is filled by the management entity by inserting <10>.

Clock shall be provided during the <idle> period to complete the transaction.

Table 6-4 SMI Protocol
SMI PROTOCOL<idle><start><op code><PHY address><reg addr><turnaround><data><idle>
Read Operation<idle><01><10><AAAAA><RRRRR><Z0><XXXX XXXX XXXX XXXX><idle>
Write Operation<idle><01><01><AAAAA><RRRRR><10><XXXX XXXX XXXX XXXX><idle>