Datasheet

 2016-2017 Microchip Technology Inc. DS00002117F-page 3
KSZ9031RNX
Table of Contents
1.0 Introduction ..................................................................................................................................................................................... 4
2.0 Pin Description and Configuration .................................................................................................................................................. 5
3.0 Functional Description .................................................................................................................................................................. 13
4.0 Register Descriptions .................................................................................................................................................................... 31
5.0 Operational Characteristics ........................................................................................................................................................... 52
6.0 Electrical Characteristics ............................................................................................................................................................... 53
7.0 Timing Diagrams ........................................................................................................................................................................... 57
8.0 Reset Circuit ................................................................................................................................................................................. 63
9.0 Reference Circuits — LED Strap-In Pins ...................................................................................................................................... 65
10.0 Reference Clock - Connection and Selection ............................................................................................................................. 66
11.0 On-Chip LDO Controller - MOSFET Selection ............................................................................................................................ 66
12.0 Magnetic - Connection and Selection ......................................................................................................................................... 67
13.0 Package Outlines ........................................................................................................................................................................ 69
Appendix A: Data Sheet Revision History ........................................................................................................................................... 74
The Microchip Web Site ...................................................................................................................................................................... 76
Customer Change Notification Service ............................................................................................................................................... 76
Customer Support ............................................................................................................................................................................... 76
Product Identification System ............................................................................................................................................................. 77