SLUAAA9A October   2020  – May 2021 DP83TD510E

 

  1.   Trademarks
  2. 1Introduction
  3. 2Terminology
  4. 3Establishing a Link
    1. 3.1 Auto-Negotiation
    2. 3.2 Forcing Host-Client Configuration
      1. 3.2.1 AN_CONTROL (address = 0x7200) [reset = 0x1000]
      2. 3.2.2 PMA_PMD_CTRL (address = 0x1834) [reset = 0x4000]
    3. 3.3 1.0 Vpp vs. 2.4 Vpp Operating Mode
  5. 410Base-T1L Cable Parameters
    1. 4.1 Characteristic Impedance
    2. 4.2 Insertion Loss
    3. 4.3 Return Loss
    4. 4.4 Maximum Delay Link
    5. 4.5 Electromagnetic Classifications
    6. 4.6 Differential to Common Mode Conversion
    7. 4.7 Coupling Attenuation
    8. 4.8 DP83TD510 Cable Reach Performance
  6. 5Revision History

3.3 1.0 Vpp vs. 2.4 Vpp Operating Mode

According to the IEEE 802.3cg specification, the PMA transmitter output voltage must fall within a +5% to -15% range of the selected operating mode, 2.4 Vpp or 1.0 Vpp. The table below shows the 10Base-T1L output differential voltage limits of each operating mode.

Table 3-5 PMA_PMD_CTRL (address = 0x1834) [reset = 0x4000]
Operating ModeMinTypMaxUnits
1.0V p2p0.851.01.05V
2.4V p2p2.042.42.52V

The operating mode of the DP83TD510 can be configured through auto-negotiation, with 2.4 Vpp taking priority if both modes are advertised. If auto-negotiation is disabled, the PHY will operate at 1.0 Vpp and can be configured to 2.4 Vpp operating mode through register settings.