KSZ8081MNX Issue Triage Guide

1 Problem Statement Questionnaire

3 Debug Flow for Problem Isolation and Resolution

3.1 Hardware Issue - Fundamental PCB Design

3.2 Hardware Issue - PCB Assembly or IC Damage

3.3 Hardware Issue - Management Interface (MDC/MDIO) Connectivity

3.4 Hardware Issue - MII Connectivity

3.5 Hardware Issue - Ethernet Connectivity

3.6 Hardware Issue - Ethernet Interface Configuration Issue

3.7 Performance Issue - Application Level Issue

4 Appendix: PHY Low Level Management Techniques

5 Appendix: Ethernet Link Testing Techniques

This appendix explains various methods to verify the PHY link status and ensure that software observations align with the electrical signaling.

6 Revision History

Microchip Information

Microchip Devices Code Protection Feature

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