JAJSJF3 December   2021 DP83TC814R-Q1 , DP83TC814S-Q1

PRODUCTION DATA  

  1. 特長
  2. アプリケーション
  3. 概要
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Timing Diagrams
    8. 7.8 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Diagnostic Tool Kit
        1. 8.3.1.1 Signal Quality Indicator
        2. 8.3.1.2 Electrostatic Discharge Sensing
        3. 8.3.1.3 Time Domain Reflectometry
        4. 8.3.1.4 Voltage Sensing
        5. 8.3.1.5 BIST and Loopback Modes
          1. 8.3.1.5.1 Data Generator and Checker
          2. 8.3.1.5.2 xMII Loopback
          3. 8.3.1.5.3 PCS Loopback
          4. 8.3.1.5.4 Digital Loopback
          5. 8.3.1.5.5 Analog Loopback
          6. 8.3.1.5.6 Reverse Loopback
      2. 8.3.2 Compliance Test Modes
        1. 8.3.2.1 Test Mode 1
        2. 8.3.2.2 Test Mode 2
        3. 8.3.2.3 Test Mode 4
        4. 8.3.2.4 Test Mode 5
    4. 8.4 Device Functional Modes
      1. 8.4.1  Power Down
      2. 8.4.2  Reset
      3. 8.4.3  Standby
      4. 8.4.4  Normal
      5. 8.4.5  Media Dependent Interface
        1. 8.4.5.1 100BASE-T1 Master and 100BASE-T1 Slave Configuration
        2. 8.4.5.2 Auto-Polarity Detection and Correction
        3. 8.4.5.3 Jabber Detection
        4. 8.4.5.4 Interleave Detection
      6. 8.4.6  MAC Interfaces
        1. 8.4.6.1 Media Independent Interface
        2. 8.4.6.2 Reduced Media Independent Interface
        3. 8.4.6.3 Reduced Gigabit Media Independent Interface
      7. 8.4.7  Serial Management Interface
      8. 8.4.8  Direct Register Access
      9. 8.4.9  Extended Register Space Access
      10. 8.4.10 Write Address Operation
        1. 8.4.10.1 MMD1 - Write Address Operation
      11. 8.4.11 Read Address Operation
        1. 8.4.11.1 MMD1 - Read Address Operation
      12. 8.4.12 Write Operation (No Post Increment)
        1. 8.4.12.1 MMD1 - Write Operation (No Post Increment)
      13. 8.4.13 Read Operation (No Post Increment)
        1. 8.4.13.1 MMD1 - Read Operation (No Post Increment)
      14. 8.4.14 Write Operation (Post Increment)
        1. 8.4.14.1 MMD1 - Write Operation (Post Increment)
      15. 8.4.15 Read Operation (Post Increment)
        1. 8.4.15.1 MMD1 - Read Operation (Post Increment)
    5. 8.5 Programming
      1. 8.5.1 Strap Configuration
      2. 8.5.2 LED Configuration
      3. 8.5.3 PHY Address Configuration
    6. 8.6 Register Maps
      1. 8.6.1 Register Access Summary
      2. 8.6.2 DP83TC814 Registers
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Physical Medium Attachment
          1. 9.2.1.1.1 Common-Mode Choke Recommendations
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Signal Traces
      2. 11.1.2 Return Path
      3. 11.1.3 Metal Pour
      4. 11.1.4 PCB Layer Stacking
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 サポート・リソース
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, 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

Voltage Sensing

The DP83TC814 offers sensors for monitoringvoltage at the supply pins. Undervoltage monitoring are always active in the DP83TC814 by default. If an undervoltage condition is detected, interrupt status flag is set in register 0x0013. These interrupts can also be optionally routed to the INT pin using the same register.

The following method should be used to read each sensor.

  • Step 1: Program register 0x0467 = 0x6004 ; Initial configuration of monitors
  • Step 2: Program register 0x046A = 0x00A3; Enable Monitors
  • Step 3: Configure register 0x0468 with the corresponding setting to select the required sensor.
    • VDDA Sensor: Use 0x0468 = 0x0920
    • VSLEEP Sensor: Use 0x0468 = 0x1920
    • VDDMAC Sensor: Use 0x0468 = 0x2920
    • VDDIO Sensor: Use 0x0468 = 0x3920
  • Step 4: Read register 0x047B[14:7] and convert this output code to decimal.
  • Step 5: Use the output code in the following equations to get the sensor's absolute value. Refer to Table 8-2 table for constant values for corresponding sensors.
    • vdda_value = 3.3 + (vdda_output_code - vdda_output_mean_code)*slope_vdda_sensor
    • vsleep_value = 3.3 + (vsleep_output_code - vsleep_output_mean_code)*slope_vsleep_sensor
    • vddmac_value = 3.3 + (vddmac_output_code - vddmac_output_mean_code)*slope_vddmac_sensor
    • vddio_value = 3.3 + (vddio_output_code - vddio_output_mean_code)*slope_vddio_sensor
Table 8-2 Sensors Constant Values
Sensor Constant Value
VDDA vdda_output_mean_code 126
slope_vdda_sensor 0.0088
VSLEEP vsleep_output_mean_code 134
slope_vsleep_sensor 0.0088
VDDMAC vddmac_output_mean_code 205
slope_vddmac_sensor 0.016
VDDIO vddio_output_mean_code 205
slope_vddio_sensor 0.016