SDAA067 August   2025 DP83826AE , DP83826AI , DP83826E , DP83826I

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Difference Between DP83826x and DP83826Ax
    1. 2.1 Fast Link-Drop (FLD) Strap Configuration
      1. 2.1.1 Basic Mode
      2. 2.1.2 Enhanced Mode
    2. 2.2 EMC Performance
  6. 3Summary
  7. 4References

2.1.1 Basic Mode

In DP83826x BASIC mode, fast link-drop is enabled by default. Fast link-drop is enabled for RX Error and Signal and Energy Loss Count.

In DP83826Ax BASIC mode, fast link-drop is still enabled by default. Additional FLD mechanisms in BASIC mode can be determined by Strap11 as shown in Table 2-1.

Table 2-1 DP83826Ax Basic Mode FLD Configuration
Strap ConfigurationRX Error CountMLT3 Error CountLow SNR ThresholdSignal and Energy LossDescrambler Link Loss
Strap 11 = Low (default)EnabledEnabled

Disabled

Enabled

Disabled

Strap 11 = HighDisabledDisabled

For both DP83826x/DP83826Ax, additional configuration can be programmed using the Control Register 3 (CR3, register address 0x000B). Bits[3:0] and bit[10] allow for various FLD conditions to be enabled.