Texas Instruments DP83869EVM Manuale utente

SNLU237–September 2018

DP83869EVM User's Guide

User's Guide

SNLU237–September 2018

DP83869EVM User's Guide

This User’s Guide discusses how to properly operate and configure the DP83869EVM. For best layout

practices, schematic files, and Bill of Materials, see the associated support documents.

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DP83869EVM User's Guide

Contents

1 Definitions .................................................................................................................... 3

2 Introduction ................................................................................................................... 4

3 Board Setup Details ......................................................................................................... 9

4 Configuration Options ..................................................................................................... 11

5 Schematics.................................................................................................................. 18

List of Figures

1 DP83869EVM – Top Side .................................................................................................. 5

2 DP83869EVM – Bottom Side ............................................................................................. 6

3 Onboard Power Supply Connection ...................................................................................... 7

4 Jumper Placements for Onboard Power ................................................................................. 7

5 DP83869EVM Block Diagram.............................................................................................. 9

6 EVM Strap Jumpers ....................................................................................................... 11

7 Onboard Clock.............................................................................................................. 15

8 External Clock Input ....................................................................................................... 15

9 Schematic Page 1 ......................................................................................................... 18

10 Schematic Page 2.......................................................................................................... 19

11 Schematic Page 3.......................................................................................................... 20

12 Schematic Page 4.......................................................................................................... 21

13 Schematic Page 5.......................................................................................................... 22

14 Schematic Page 6.......................................................................................................... 23

List of Tables

1 Terminology .................................................................................................................. 3

2 EVM Applications .......................................................................................................... 10

3 4 Level Straps .............................................................................................................. 11

4 2 Level Straps .............................................................................................................. 11

5 PHY Strap Table ........................................................................................................... 12

6 Functional Mode Strap Table............................................................................................. 12

7 Copper Ethernet Strap Table............................................................................................. 12

8 1000Base-X Strap Table.................................................................................................. 13

9 100Base-X Strap Table.................................................................................................... 13

10 Bridge Mode Strap Table.................................................................................................. 13

11 100M Media Convertor Strap Table ..................................................................................... 13

12 1000M Media Strap Table ................................................................................................ 14

13 4-Pin Dip Switch Modes................................................................................................... 15

Trademarks

All trademarks are the property of their respective owners.

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Definitions

SNLU237–September 2018

DP83869EVM User's Guide

1 Definitions

Table 1. Terminology

ACRONYM DEFINITION

PHY Physical Layer Transceiver

MAC Media Access Controller

SMI Serial Management Interface

MDIO Management Data I/O

MDC Management Data Clock

MII Media Independent Interface

RMII Reduced Media Independent Interface

RGMII Reduced Gigabit Media Independent Interface

SGMII Serial Gigabit Media Independent Interface

VDDA Analog Core Supply Rail

VDDIO Digital Supply Rail

PD Pulldown

PU Pullup

Introduction

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DP83869EVM User's Guide

2 Introduction

The DP83869 is a low power, fully-featured Physical Layer transceiver with integrated PMD sublayers to

support 10BASE-Te, 100BASE-TX, and 1000BASE-T Ethernet protocols. It also supports Fiber protocols

1000BASE-X and 100BASE-FX. Optimized for ESD protection, the DP83869 exceeds 8-kV IEC 61000-4-2

(direct contact). This device interfaces to the MAC layer through Reduced GMII (RGMII) and SGMII.

Integrated Termination Impedance on RGMII helps reduce system BOM. The DP83869EVM will

demonstrate all features of DP83869. The EVM will support Copper Ethernet protocols like 10BASE-Te,

100BASE-TX, and 1000BASE-T. It also supports Fiber protocols 1000BASE-X and 100BASE-FX. The

EVM has connections to use the DP83869 MAC Inerface in RGMII and SGMII mode. The EVM will also

be optimized to demonstrate the robust EMI. EMC, and ESD performance of the DP83869 device.

2.1 Key Features

• Multiple Operating Modes

– Media Support: Copper and Fiber

– Media Conversion: Copper to Fiber

– Bridge Conversion: RGMII to SGMII, SGMII to RGMII

• RGMII and SGMII MAC Interfaces

• 1000Base-X, 100Base-T, 100Base-TX, 10Base-Te

• USB-2-MDIO Support Through Onboard MSP430 for Easy Register Access

• Onboard LDO and External Power Supply Options

• Status LEDs

– Link

– Activity

– Power

• Bootstraps for Hardware Configuration

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Introduction

SNLU237–September 2018

DP83869EVM User's Guide

Figure 1. DP83869EVM – Top Side

Introduction

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DP83869EVM User's Guide

Figure 2. DP83869EVM – Bottom Side

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Introduction

SNLU237–September 2018

DP83869EVM User's Guide

2.2 Quick Setup

2.2.1 Onboard Power Supply Operation

The EVM can be supplied power through multiple options. Single-supply operation uses onboard LDOs to

generate the voltages required for operating various sections of the EVM (PHY, MSP430, FO transceiver,

and so forth).

Figure 3. Onboard Power Supply Connection

The EVM can be supplied power by either a J26 barrel jack connector, power-supply turrets, or a USB

• For Barrel Jack and Turret, connect the jumper in the ON position to J22 and the jumper on 5V-LDO to

J34.

• For USB power, connect the Jumper on 5V-USB position to J35. J23 is don’t care.

2.2.2 External Power Supply Operation

Figure 4. Jumper Placements for Onboard Power

The jumpers shown in Figure 4 can be used to choose whether a particular voltage rail is supplied through

onboard LDOs or an external power supply. If an external power supply is desired on a voltage rail,

change its respective jumper from position 1-2 (LDO) to 2-3 (External). Then connect the appropriate

voltage on its corresponding pin to the P1 connector. For example, if the VDDA2P5 is to be supplied from

an external supply, then change jumper position of J36 from 1-2 to 2-3. Then connect the 2.5-V external

supply on pins 9-10 on the P1 connector. Note that pin 9 is supply and pin 10 is ground.

2.2.3 Software

The onboard MSP430 comes pre-programmed and ready to use. When using this EVM for the first time

on a Windows 7 (or above) PC, MSP430 drivers and USB2MDIO software utility will have to be installed.

The USB2MDIO software can be used for accessing registers.

2.2.3.1 MSP430 Driver

Install the latest MSP430 drive from this website: http://software-

dl.ti.com/msp430/msp430_public_sw/mcu/msp430/MSP430_FET_Drivers/latest/index_FDS.html.

Introduction

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2.2.3.2 USB-2-MDIO Software

Download the software from http://www.ti.com/tool/usb-2-mdio. The Web page also contains a User’s

Guide for installing and using the software.

The MSP430 is on board the EVM, so it is not required to purchase a separate MSP430 Launchpad kit

and connect to the PHY using wires. The entire EVM can be powered and controlled through a USB

connector. MSP430 and USB2MDIO utility can be used even when power is not supplied through a USB.

In case the onboard MSP430 cannot be used due to some reason, MDIO and MDC pins are also broken

out on the J15 connector. Customers can connect a MSP430 launchpad or their own MDIO-MDC utility on

J15 to access the PHY registers.

DP83869

DUT

LDO

1.0V

LDO

2.5V

LDO

3.3V IO

LDO

MSP-430

EVM BLOCK

3.3V

LDO

LEDs

LED SPEED

LED ACT

LED LINK

SMI

Connector

Magnetics/

Capacitive

Coupling

RJ-45

Transceiver

RGMII Header

& Samtec

SMA

USB

External Supply

Header

25MHz Clock in

MDC

MDIO

SGMII

Fiber IO

ESD

Diodes

RESET

Turrets

Barrel Jack

3.3V from

MSP430 LDO

1x3

Header

Power

DATA

Jumper

(LDO vs External)

1.0VI/O 2.5V 1.8V

I/OCORE

Strap

Resistors

JTAG

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Board Setup Details

SNLU237–September 2018

DP83869EVM User's Guide

3 Board Setup Details

3.1 Block Diagram

Figure 5. DP83869EVM Block Diagram

Board Setup Details

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3.2 EVM High-Level Summary

The DP83869EVM supports SMI through J2 using pin 26 for MDIO and 28 for MDC. These pins can be

connected to an MSP430 Launchpad, which can be used for USB-2-MDIO control.

Table 2. EVM Applications

NO. DP83869 MODE APPLICATIONS HOW TO USE

1 RGMII to Copper Run traffic between RGMII and Copper. Connect to DP83867 RGMII EVM or MAC

System using Header pins/Samtech connector.

Perform IEEE and UNH compliance testing Use onboard MSP430 to activate test mode

waveform on DP83869

Run EMI/EMC Test on EVM Use internal PRBS and loopback

Measure Power Dissipation Connect external power supplies.

External MAC loopback Connect external MAC to headers/Samtech

connector.

2 SGMII to Copper Run traffic between SGMII and Copper. Connect to DP83867 SGMII EVM or MAC

System using SMA connector.

Perform IEEE and UNH compliance testing Use onboard MSP430 to activate test mode

waveform on DP83869.

Run EMI/EMC Test on EVM Use internal PRBS and loopback

External SGMII loopback Use SMA cable for Passive Loopback.

3 RGMII to Fiber

Ethernet Run traffic between RGMII and Fiber Ethernet. Straps to enable Fiber Ethernet. Connect to

DP83867 RGMII EVM or MAC System using

Header/Samtech.

Perform IEEE and UNH compliance testing Use onboard MSP430 to activate test mode

waveforms.

Run EMI/EMC Test on EVM Use internal PRBS and loopback

Measure Power Dissipation Connect external power supplies.

4 100M Media Convertor Demonstrate 100M functionality on EVM Use SFP and RJ45 connector for fiber and

copper ethernet. Straps will be used for

unmanaged mode and MDIO for managed

mode.

Demonstrate FAR End fault capability

Demonstrate unmanaged mode of Media

convertor

5 1000M Media

Convertor Demonstrate 1000M functionality on EVM Use SFP and RJ45 connector for fiber and

copper ethernet. Straps will be used for

unmanged mode and MDIO for managed mode.

Demonstrate Link Loss Pass Thru Capability

Demonstrate unmanaged mode of Media

Convertor

6 RGMII to SGMII bridge Demonstrate SGMII as MAC able to link with

SGMII i/f of Phy ( DP83867) Connect to DP83867 SGMII EVM over SMA

connectors and monitor RGMII header on 869

EVM.

Demonstrate SGMII link speed is reflected on

RGMII

Demonstrate Complete Data path Use-case Use DP83867 RGMII EVM and SGMII EVM with

DP83869EVM.

7 SGMII to RGMII bridge Demonstrate RGMII of DP83869 is able to link-

up with RGMII of DP83867 Connect to DP83867 RGMII EVM over Samtech

connectors and monitor SGMII SMA on 869

EVM.

Demonstrate SGMII link speed is reflecting

RGMII speed

Demonstrate Complete Data path Use-case Use DP83867 RGMII EVM and SGMII EVM with

DP83869EVM.

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