SNLA487 May   2025 DP83826AE , DP83826AI

 

  1.   1
  2.   KSZ8081MNX/RNB to DP83826A System Rollover
  3.   Trademarks
  4. 1Purpose
  5. 2Required Changes
    1. 2.1 Strap Resistor Value
    2. 2.2 External Capacitor on Pin 2
    3. 2.3 Duplex Strap on Pin 16 (DP83826A Basic Mode)
    4. 2.4 Selecting 10M with Auto-Negotiation Enabled (DP83826A Basic Mode)
    5. 2.5 Configuring LED_1 for Tx and Rx Activity for EtherCAT Slave (DP83826A Basic Mode)
    6. 2.6 Thermal Pad Adjustments in Layout
    7. 2.7 Physical Layer ID Register
  6. 3Potential Changes
    1. 3.1 MDIO Pull-Up Resistor on Pin 11
    2. 3.2 MDIO Register Writes
    3. 3.3 Capacitors on Center Tap of Magnetics
  7. 4Informational Changes
  8. 5Pinout Mapping
    1. 5.1 Pin Mapping
  9. 6DP83826A Strap Configurations
    1. 6.1 Bootstrap Configurations

4 Informational Changes

This section describes feature differences between the DP83826A and KSZ8081.

Table 4-1 DP83826A vs. KSZ8081MNX/RNB Feature Set Comparison
FeaturesKSZ8081MNX/RNBDP83826A
VDDIO1.8V, 2.5V, 3.3V1.8V, 3.3V
NAND Tree SupportSupportedNot Supported
PHY Broadcast AddressSupportedNot Supported
MII Back-2-Back ModeSupportedSupported in ENHANCED Mode for Repeater Functionality
Slow Oscillator ModeSupportedSupported - known as Deep Power Down Mode