SNLA423 March   2023 DP83826E

 

  1. 1Trademarks
  2. 2DP83826 Application Overview
  3. 3Troubleshooting the Application
    1. 3.1 Read and Check Register Values
    2. 3.2 Schematic and Layout Checklist
    3. 3.3 Component Checklist
    4. 3.4 Peripheral Pin Checks
      1. 3.4.1 Power Supplies
      2. 3.4.2 Probe the XI Clock
      3. 3.4.3 Probe the RESET_N Signal
      4. 3.4.4 Probe the Strap Pins During Initialization
      5. 3.4.5 Probe the Serial Management Interface Signals (MDC, MDIO)
      6. 3.4.6 Probe the MDI Signals
    5. 3.5 Link Quality Check
    6. 3.6 Built-In Self Test with Various Loopback Modes
    7. 3.7 Debugging MAC Interface
    8. 3.8 Tools and References
      1. 3.8.1 DP83826 Register Access
      2. 3.8.2 Extended Register Access
      3. 3.8.3 Application Note References
  4. 4Conclusion
  5. 5Revision History

3.8.2 Extended Register Access

To read and write registers in extended register space, refer to the following procedures:

Write procedure for MMD "1F" registers:

write reg<000D> = 0x001F

write reg<000E> = <address>

write reg<000D> = 0x401F

write reg<000E> = <value>

Read procedure for MMD "1F" registers:

write reg<000D> = 0x001F

write reg<000E> = <address>

write reg<000D> = 0x401F

read reg<000E>

Note: To read/write MMD "1" registers, replace 1F with 01.

Note: Above write and read procedure is normally used for registers with address greater than 0x001F, but the procedure can also be used for any address in gernal.