Texas Instruments Jacinto7 Manuel utilisateur

User’s Guide

Jacinto7 EVM Quad Port Ethernet Expansion Board

User’s Guide

Table of Contents

1 Introduction.............................................................................................................................................................................2

1.1 Key Features......................................................................................................................................................................2

1.2 Thermal Compliance.......................................................................................................................................................... 2

1.3 EMC, EMI, and ESD Compliance...................................................................................................................................... 2

2 QP-ENET Board Identification and Installation....................................................................................................................3

2.1 QP-ENET Board Component Identification........................................................................................................................3

2.2 Interfacing QP-ENET Expansion Board with J7AHP EVM Board...................................................................................... 4

3 QP-ENET Expansion Board Hardware Architecture............................................................................................................9

3.1 QP-ENET Expansion Board Hardware Top Level Diagram............................................................................................... 9

3.2 Expansion Connectors....................................................................................................................................................... 9

3.3 Board ID EEPROM.......................................................................................................................................................... 10

3.4 Ethernet Interface.............................................................................................................................................................11

A Appendix...............................................................................................................................................................................15

A.1 Appendix – I (Interface Mapping).....................................................................................................................................15

A.2 Appendix – II (QP-ENET Board GPIO Mapping)............................................................................................................. 15

Trademarks

All trademarks are the property of their respective owners.

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Jacinto7 EVM Quad Port Ethernet Expansion Board User’s Guide 1

1 Introduction

The Jacinto7 EVMs are development and evaluation systems that enable developers to write software and

develop hardware around the Jacinto7 family of processors. The main elements of the system are available on

the EVM system itself. This gives developers the basic resources needed for most general-purpose type projects

that encompass the Jacinto7 processor.

Beyond the basic resources provided, additional functionality can be added via expansion cards.

This Technical User’s Guide describes the hardware architecture of the Jacinto7 EVM – Quad Port Ethernet

Expansion board (QP-ENET), which is interfaced with J7 EVM boards through Serial Ethernet Expansion

Connector.

1.1 Key Features

Key features of QP-ENET:

• Ethernet

– 4x 10/100/1000Mbps - SGMII ports (VSC8514XMK-11)

• Board ID EEPROM

• Programmable Clock Generator

1.2 Thermal Compliance

There is elevated heat on the processor/heatsink: use caution, particularly at elevated ambient temperatures.

Although the processor/heatsink is not a burn hazard, caution should be used when handling the EVM due to

increased heat in the area of the heatsink.

1.3 EMC, EMI, and ESD Compliance

Components installed on the product are sensitive to Electrostatic Discharge (ESD). TI recommends that this

product be used in an ESD controlled environment. This may include a temperature and/or humidity controlled

environment to limit the build-up of ESD. TI also recommends using ESD protection such as wrist straps and

ESD mats when interfacing with the product.

The product is used in the basic electromagnetic environment as in laboratory condition and the applied

standard will be as per EN IEC 61326-1:2021.

Introduction www.ti.com

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2 QP-ENET Board Identification and Installation

2.1 QP-ENET Board Component Identification

Figure 2-1. QP-ENET Expansion Board Component Identification

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2.2 Interfacing QP-ENET Expansion Board with J7AHP EVM Board

QP-ENET Expansion boards shall be interfaced with Jacinto7AHP EVM Boards in bottom mating configurations.

The images below show the J7AHP EVM board connectors J51 and J52, which mate with the QP-ENET board

as an example, with expansion connectors J3 on the QP-ENET mated to the SGMII Expansion connectors on

the J7AHP EVM. It is valid to support/install on only one QP-ENET board, and in either location.

Figure 2-2. QP-ENET Expansion Board Bottom Side

QP-ENET Board Identification and Installation www.ti.com

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Figure 2-3. Q/SGMII Expansion Connector on Jacinto7AHP EVM Board Bottom Side

2.2.1 Detailed Board Assembly Procedure (J7AHP EVM)

This assembly procedure example is given for mating the QP-ENET board with the J7AHP EVM board.

1. Take the Assembled J7AHP EVM Board

2. Add M2.5 x 5mm hex spacers on each mounting holes provided on either sides of the J51 & J52 connector

of the J7AHP EVM and secure it with M2.5 x 4 mm Phillips screws from the bottom sides to hold the spacer

in place.

3. Add M3 x 12mm Phillips screws through the mounting hole provided between the Ethernet connectors on

the QP ENET board (shown in the picture below) and secure it with a M3 x 5mm hex spacer from the other

side (this step is done only on the QP ENET board).

4. Mount the QP board onto the J7AHP EVM connectors J51 & J52, making sure the connectors are seated

evenly.

5. Add M2.5 x 4 mm Phillips screws from the top side of the QP to secure the QP mating with the J7AHP EVM

board.

6. Add the M2.5 x 5 mm male to male spacer from the top side of the J7AHP EVM board to secure the

remaining M3 screw protruding from the QP to the J7AHP board.

7. Add a M3 x 5mm spacer from the top side of the J7AHP EVM board to lock the other end of the M3 x12mm

Phillips screw.

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Figure 2-4. QP ENET Board

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Figure 2-5. Bottom Side of J7AHP EVM

Figure 2-6. Top Side of J7AHP EVM

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Figure 2-7. J7AHP EVM - QP ENET Board Assembly Procedure

QP-ENET Board Identification and Installation www.ti.com

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3 QP-ENET Expansion Board Hardware Architecture

This section explains the Hardware Architecture of QP-ENET Expansion Board in detail.

3.1 QP-ENET Expansion Board Hardware Top Level Diagram

The generic functional block diagram of the QP-ENET Expansion Board is shown below.

Figure 3-1. Functional Block Diagram of QP-ENET Expansion Board

3.2 Expansion Connectors

The J7AHP EVM board includes two Serial Ethernet Expansion connectors of 171446-1109 with 5-mm mating

height, allowing the ENET expansion board (Quad-Port Ethernet Expansion) to be stacked on bottom side of the

J7AHP EVM board.

This section provides an overview of the different interfaces and circuits on the Quad port Ethernet Expansion

Board. The following table contains the Pin out/Signal mapping for the ENET Expansion connector.

Table 3-1. ENET Expansion Connector J3 Pinouts

PIN Net Name PIN Net Name

1 DGND 31 QSGMII_INTN

2 NC 32 DGND

3 NC 33 QSGMII4_TX_P

4 DGND 34 QSGMII4_TX_N

5 NC 35 DGND

6 NC 36 QSGMII4_RX_P

7 DGND 37 QSGMII4_RX_N

8 NC 38 DGND

9 NC 39 QSGMII_PHY_REFCLK_N

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Table 3-1. ENET Expansion Connector J3 Pinouts (continued)

PIN Net Name PIN Net Name

10 DGND 40 QSGMII_PHY_REFCLK_P

11 VSYS_IO_3V3 41 DGND

12 VSYS_IO_3V3 42 QSGMII_MDC

13 DGND 43 QSGMII_MDIO

14 EEPROM_A0 44 DGND

15 EEPROM_A1 45 QSGMII_RESETN

16 EEPROM_A2 46 CDCI_I2C_SEL

17 DGND 47 ENET_EXP_SPARE

18 EEPROM_WP 48 DGND

19 REFCLK_25MHZ 49 VSYS_5V0

20 DGND 50 VSYS_5V0

21 WKUP_I2C0_SCL 51 DGND

22 WKUP_I2C0_SDA 52 NC

23 DGND 53 NC

24 I2C0_SCL 54 DGND

25 I2C0_SDA 55 VCC_3V3

26 DGND 56 VCC_3V3

27 VCC_12V0 57 DGND

28 VCC_12V0 58 NC

29 DGND 59 NC

30 ENET_EXP_PWRDN 60 DGND

SH1 DGND SH2 DGND

3.3 Board ID EEPROM

The Quad port Ethernet Expansion Board is identified by its version and serial number, which are stored in

the onboard EEPROM. On the J7AHP EVM, there are two QP-ENET expansion connectors available: one

QP-ENET is set to address 0x54, the other one is set to 0x51, which are accessible on WKUP_I2C0.

The first 259 bytes of addressable EEPROM memory are preprogrammed with identification information for each

board. The remaining 32509 bytes are available to the user for data or code storage.

Figure 3-2. Board ID EEPROM

Table 3-2. Board ID Memory Header Information

Header Field Name Size (bytes) Description

MAGIC 4 Magic Number

TYPE 1 Fixed length and variable position board ID

header

2 Size of payload

BRD_INFO TYPE 1 Payload type

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