SNLS604E September   2020  – November 2022 DP83TG720S-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
    2. 5.1 Pin States
    3. 5.2 Pin Power Domain
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Timing Diagrams
    8. 6.8 LED Drive Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Diagnostic Tool Kit
        1. 7.3.1.1 Signal Quality Indicator
        2. 7.3.1.2 Time Domain Reflectometry
        3. 7.3.1.3 Built-In Self-Test For Datapath
          1. 7.3.1.3.1 Loopback Modes
          2. 7.3.1.3.2 Data Generator
          3. 7.3.1.3.3 Programming Datapath BIST
        4. 7.3.1.4 Temperature and Voltage Sensing
        5. 7.3.1.5 Electrostatic Discharge Sensing
      2. 7.3.2 Compliance Test Modes
        1. 7.3.2.1 Test Mode 1
        2. 7.3.2.2 Test Mode 2
        3. 7.3.2.3 Test Mode 4
        4. 7.3.2.4 Test Mode 5
        5. 7.3.2.5 Test Mode 6
        6. 7.3.2.6 Test Mode 7
    4. 7.4 Device Functional Modes
      1. 7.4.1  Power Down
      2. 7.4.2  Reset
      3. 7.4.3  Standby
      4. 7.4.4  Normal
      5. 7.4.5  Sleep
      6. 7.4.6  State Transitions
        1. 7.4.6.1 State Transition #1 - Standby to Normal
        2. 7.4.6.2 State Transition #2 - Normal to Standby
        3. 7.4.6.3 State Transition #3 - Normal to Sleep
        4. 7.4.6.4 State Transition #4 - Sleep to Normal
      7. 7.4.7  Media Dependent Interface
        1. 7.4.7.1 MDI Master and MDI Slave Configuration
        2. 7.4.7.2 Auto-Polarity Detection and Correction
      8. 7.4.8  MAC Interfaces
        1. 7.4.8.1 Reduced Gigabit Media Independent Interface
        2. 7.4.8.2 Serial Gigabit Media Independent Interface
      9. 7.4.9  Serial Management Interface
      10. 7.4.10 Direct Register Access
      11. 7.4.11 Extended Register Space Access
      12. 7.4.12 Write Address Operation
        1. 7.4.12.1 Example - Write Address Operation
      13. 7.4.13 Read Address Operation
        1. 7.4.13.1 Example - Read Address Operation
      14. 7.4.14 Write Operation (No Post Increment)
        1. 7.4.14.1 Example - Write Operation (No Post Increment)
      15. 7.4.15 Read Operation (No Post Increment)
        1. 7.4.15.1 Example - Read Operation (No Post Increment)
      16. 7.4.16 Write Operation (Post Increment)
        1. 7.4.16.1 Example - Write Operation (Post Increment)
      17. 7.4.17 Read Operation (Post Increment)
        1. 7.4.17.1 Example - Read Operation (Post Increment)
    5. 7.5 Programming
      1. 7.5.1 Strap Configuration
      2. 7.5.2 LED Configuration
      3. 7.5.3 PHY Address Configuration
    6. 7.6 Register Maps
      1. 7.6.1 Register Access Summary
      2. 7.6.2 DP83TG720 Registers
        1. 7.6.2.1 Base Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
  9. 9 Power Supply Recommendations
  10. 10Compatibility with TI's 100BT1 PHY
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Signal Traces
      2. 11.1.2 Return Path
      3. 11.1.3 Physical Medium Attachment
      4. 11.1.4 Metal Pour
      5. 11.1.5 PCB Layer Stacking
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Package Option Addendum
      1. 13.1.1 Packaging Information
      2. 13.1.2 Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.1.4 Temperature and Voltage Sensing

Temperature sensor of PHY can be used to give the indication of the temperature of the system and reading can be taken on the fly by reading the temperature sensor output register.

Voltage sensor senses the voltage of all the supply pins: vdda, vddio and vdd1p0. Each pins active voltage can be sensed by reading the corresponding voltage sensor output register.

All sensors are always active and monitor state machine polls the value of each sensor periodically. Monitor state machine can be further programmed to give higher priority/sampling time to one sensor over another by using MONITOR_CTRL_3 register.

Following software sequence can be used to read out any sensor's output:

  • Step1 : Program register[0x0467] = 0x6004 ; Initial configuration of monitors
  • Step 2 : Program register [0x046A] = 0x00A6 and then register [0x046A]=0x00A3; Refresh the monitors
  • Step 3 : Program register[0x0468] to select the corresponding sensor to be polled and read register [0x047B] [14:7] for selected sensor's output code.
  • Step 4 : Feed the values of read sensor's output code (in decimal) in following equations to get the sensor's output value in decimals. Refer to Table 7-3 for required value of constants to be used in equations :
    • vdda_value = 3.3 + (vdda_output_code - vdda_output_mean_code)*slope_vdda_sensor
    • vdd1p0_value = 1.0 + (vdd1p0_output_code - vdd1p0_ouput_mean_code)*slope_vdd1p0_sensor
    • vddio_calculated = 3.3 + (vddio_ouput_code - vddio_output_mean_code)*slope_vddio_sensor
    • temperature_calculated = 25 + (temperature_output_code - temperature_output_mean_code)*slope_temperature_sensor
      Table 7-3 Sensor Select Table
      Register[0x0468] Sensor Selected To Read-out
      0x1920 VDDA Voltage Sensor
      0x2920 VDD1P0 Voltage Sensor
      0x3920 VDDIO Voltage Sensor
      0x4920 Temperature Sensor
      Table 7-4 Sensor's Constant Values
      Constant Value (in decimal)
      vdda_output_mean_code 128
      slope_vdda3p3_sensor 8.63014e-3
      vdd1p0_output_mean_code 93
      slope_vdd1p0_sensor 2.85714e-3
      vddio_output_mean_code 224
      slope_vddio_sensor 15.686e-3
      temperature_output_mean_code 161
      slope_temperature_sensor 1.5
      Note: Accuracy of temperature sensor can be maximized (7.5degreeC), if customer can sample "temperature_output_code" at 25C and use it as "temperature_output_mean_code".