Texas Instruments DP83TG721EVM-MC Manuale utente

User’s Guide

DP83TG721EVM-MC User Guide

ABSTRACT

This User’s Guide discusses how to properly operate and configure the DP83TG721 Media Converter EVM. For

layout, schematic files, and Bill of Materials, see the DP83TG721 product page.

DP83TG721EVM-MC

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DP83TG721EVM-MC User Guide 1

Note

TI is transitioning to use more inclusive terminology. Some language may be different than what you

would expect to see for certain technology areas.

Table of Contents

1 Introduction.............................................................................................................................................................................3

1.1 Key Features......................................................................................................................................................................3

1.2 Board Connections.............................................................................................................................................................4

2 Operation - Quick Start...........................................................................................................................................................6

3 Further Configuration.............................................................................................................................................................7

3.1 Power Supply..................................................................................................................................................................... 7

3.2 MSP Connection................................................................................................................................................................ 8

3.3 Master and Slave Mode Selection..................................................................................................................................... 8

3.4 Wake Selection.................................................................................................................................................................. 9

3.5 Autonomous/Managed Mode Selection........................................................................................................................... 10

3.6 LED Indication.................................................................................................................................................................. 11

3.7 Clock Configuration..........................................................................................................................................................12

3.8 MDI Connection............................................................................................................................................................... 13

4 Schematic, Board Layout, and Bill of Materials.................................................................................................................14

4.1 Schematic........................................................................................................................................................................ 15

Trademarks

All trademarks are the property of their respective owners.

Table of Contents www.ti.com

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1 Introduction

The DP83TG721EVM-MC supports 1000 Mbps speed and is IEEE 802.3bp compliant. There is an on-board

MSP430F5529 for use with the USB2MDIO graphical user interface tool. The DP83867 is provided for copper

(1000BASE-T) support using the RGMII MAC Interface.

1.1 Key Features

• Media Converter: 1000BASE-T to 1000BASE-T1

• IEEE802.3bp Compliant

• RGMII Back-to-Back Configuration

• On-board MSP430F5529

– USB2MDIO Support

• Status LEDs

– Link

– Link + Activity

– Power-On

VBAT

5-20V

DC-DC 5V

DP83TG721

VDDIO VDDA VDD1P1 VSLEEP

DP83867

VDD1P0 VDDA2P5 VDDIO

3.3V LDO

RJ-45 w/

Integrated

Magnetics CMC Automotive

Connector

MSP430F5529 USB

MDIO

MDC

RGMII

3.3V LDO 3.3V LDO

1.1V LDO

3.3V LDO

VDDA1P8

2.5V LDO1.8V LDO1.0V LDO

USB 5V

60 pin

connector

bridges

two sides

Industrial side Automo



ve side

MDIO

MDC

Figure 1-1. DP83TG721EVM-MC Block Diagram

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DP83TG721EVM-MC User Guide 3

1.2 Board Connections

Figure 1-2. Board Connections

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Number Description

1MATEnet automotive Ethernet connector

2RJ45 Ethernet connector

35-20V input

4Micro-USB for power and data

560 pin media conversion connector

6Reset button

7 SMA MDI connection for DP83TG721

8External clock-in for DP83TG721

9DP83867 CLKOUT

10 DP83TG721 CLKOUT

11 Break-here line

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DP83TG721EVM-MC User Guide 5

2 Operation - Quick Start

1. Break the PCB along the perforated line and connect the two halves through the 60 pin connectors as shown

in Figure 2-1.

Figure 2-1. DP83TG721EVM Media Conversion

2. Connect a micro USB cable from J1 to any windows laptop or PC.

3. Open USB-2-MDIO on the laptop or PC.

4. Read register 0x0003 on both on-board PHYs and ensure the values match Table 2-1.

Table 2-1. Default Register 0x3 Values

DP83TG721 (PHY_ID = 0) 0xA290

DP83867 (PHY_ID = 9) 0xA231

5. Load initialization script given in SNLA422. See section 2.3.4 of USB-2-MDIO User's Guide for how to make

and load scripts.

6. The board is now ready to connect to a link partner. If you wish, perform steps 1-5 on an additional

DP83TG721EVM-MC and connect the boards together using an automotive Ethernet cable with MATEnet

connectors.

a. Ensure that master/slave selection is configured appropriately (Through register write or bootstrap).

b. Verify the power and link LEDs are on (see section Section 3.6).

7. For media conversion, connect an Ethernet cable to the RJ45 port.

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3 Further Configuration

3.1 Power Supply

• The EVM can be powered directly through the micro-USB port.

• Alternately, connect 5-20V to TP7 and GND to TP8, or use the terminal block J28.

Figure 3-1. Power Supply Connection

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DP83TG721EVM-MC User Guide 7

3.2 MSP Connection

• By default, the on-board MSP430 is connected to both PHYs for MDC/MDIO communication.

• To use an external MDC/MDIO connection, remove jumpers on J10, J13, J15 and connect external

connections to pin 2 of each header.

Figure 3-2. MDC/MDIO Connections

3.3 Master and Slave Mode Selection

• Master Mode: Place shunt across pins 2 and 3 of J12.

• Slave Mode: Place shunt across pins 1 and 2 of J12.

Figure 3-3. Master/Slave Jumper

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3.4 Wake Selection

• Wake High: Place shunt across pins 1 and 2 of J4.

• Wake Low: Place shunt across pin 2 of J4 and J7.

Figure 3-4. Wake Jumper

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DP83TG721EVM-MC User Guide 9

3.5 Autonomous/Managed Mode Selection

The DP83TG721 has two modes of operation, autonomous and managed, to select the behavior immediately

after power up. In autonomous mode, the PHY automatically transitions from Standby to the Normal state

upon POR completion. In managed operation, the PHY only transitions to the Normal state after register write

(<0x018C> = 0x0001). To select the mode, place a shunt on header J5 in the position indicated in Figure 3-5.

Figure 3-5. Autonomous/Managed Mode Selection

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