ksz9031phy芯片手册_KSZ9031RGMII时序不正确

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 2016-2017 Microchip Technology Inc. DS00002117E-page 1

Features

• Single-Chip 10/100/1000 Mbps Ethernet Trans-

ceiver Suitable for IEEE 802.3 Applications

• RGMII Timing Supports On-Chip Delay According

to RGMII Version 2.0, with Programming Options

for External Delay and Making Adjustments and

Corrections to TX and RX Timing Paths

• RGMII with 3.3V/2.5V/1.8V Tolerant I/Os

• Auto-Negotiation to Automatically Select the

Highest Link-Up Speed (10/100/1000 Mbps) and

Duplex (Half/Full)

• On-Chip Termination Resistors for the Differential

Pairs

• On-Chip LDO Controller to Support Single 3.3V

Supply Operation – Requires Only One External

FET to Generate 1.2V for the Core

• Jumbo Frame Support up to 16 KB

• 125 MHz Reference Clock Output

• Energy Detect Power-Down Mode for Reduced

Power Consumption When the Cable is Not

Attached

• Wake-On-LAN (WOL) Support with Robust Cus-

tom-Packet Detection

• Programmable LED Outputs for Link, Activity, and

Speed

• Baseline Wander Correction

• LinkMD TDR-Based Cable Diagnostic to Identify

Faulty Copper Cabling

• Parametric NAND Tree Support to Detect Faults

Between Chip I/Os and Board

• Loopback Modes for Diagnostics

• Automatic MDI/MDI-X Crossover to Detect and

Correct Pair Swap at all Speeds of Operation

• Automatic Detection and Correction of Pair

Swaps, Pair Skew, and Pair Polarity

• MDC/MDIO Management Interface for PHY Reg-

ister Configuration

• Interrupt Pin Option

• Power-Down and Power-Saving Modes

• Operating Voltages

- Core (DVDDL, AVDDL, AVDDL_PLL): 1.2V

(External FET or Regulator)

- VDD I/O (DVDDH): 3.3V, 2.5V, or 1.8V

- Transceiver (AVDDH): 3.3V or 2.5V (Com-

mercial Temp.)

• AEC-Q100 Grade 3 (KSZ9031RNXUA/UB) and

Grade 2 (KSZ9031RNXVA/VB) Qualified for Auto-

motive Applications

• 48-pin QFN (7 mm × 7 mm) Package

Target Applications

• Laser/Network Printer

• Network Attached Storage (NAS)

• Network Server

• Gigabit LAN on Motherboard (GLOM)

• Broadband Gateway

• Gigabit SOHO/SMB Router

•IPTV

• IP Set-Top Box

• Game Console

• Triple-Play (Data, Voice, Video) Media Center

• Industrial Control

• Automotive In-Vehicle Networking

KSZ9031RNX

Gigabit Ethernet Transceiver with RGMII

Support

 2016-2017 Microchip Technology Inc. DS00002117E-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