Microchip Technology EVB-USB4x12 User manual

Brand: Microchip Technology

Model: EVB-USB4x12

Type: User manual

Microchip Technology EVB-USB4x12 is an evaluation board (EVB) that allows for the easy evaluation of the USB4712/USB4912 USB2.0 High-Speed Hub Controllers. The EVB-USB4x12 is a fully assembled and tested board that provides a convenient platform for evaluating the features and performance of the USB4712/USB4912 devices. The EVB-USB4x12 can be used to evaluate the following features of the USB4712/USB4912 devices:

USB 2.0 compliant operation
Support for up to 4 downstream ports
Integrated PHY for USB 2.0 operation
Low power consumption
Programmable LED indicators
On-board reset circuitry

USB 2.0 compliant operation
Support for up to 4 downstream ports
Integrated PHY for USB 2.0 operation
Low power consumption
Programmable LED indicators
On-board reset circuitry

 2019 Microchip Technology Inc. DS50002889A

EVB-USB4x12

Evaluation Board

User’s Guide

DS50002889A-page 2  2019 Microchip Technology Inc.

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the

intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our

knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data

Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not

mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our

products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts

allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Microchip received ISO/TS-16949:2009 certification for its worldwide

headquarters, design and wafer fabrication facilities in Chandler and

Tempe, Arizona; Gresham, Oregon and design centers in California

and India. The Company’s quality system processes and procedures

are for its PIC

MCUs and dsPIC

DSCs, KEELOQ

code hopping

devices, Serial EEPROMs, microperipherals, nonvolatile memory and

analog products. In addition, Microchip’s quality system for the design

and manufacture of development systems is ISO 9001:2000 certified.

QUALITYMANAGEMENTSYSTEM

CER TIFIEDBYDNV

== ISO/TS16949==

Information contained in this publication regarding device applications and the like is provided only for your convenience and may be

superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO

REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR

OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE,

MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Micro-

chip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold

harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or

otherwise, under any Microchip intellectual property rights unless otherwise stated.

Trademarks

The Microchip name and logo, the Microchip logo, AnyRate, AVR, AVR logo, AVR Freaks, BitCloud, chipKIT, chipKIT logo, CryptoMemory,

CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq, Kleer, LANCheck, LINK MD, maXStylus, maXTouch, MediaLB, megaAVR,

MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip Designer, QTouch, SAM-BA, SpyNIC, SST, SST

Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other

countries.

ClockWorks, The Embedded Control Solutions Company, EtherSynch, Hyper Speed Control, HyperLight Load, IntelliMOS, mTouch, Precision

Edge, and Quiet-Wire are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom, CodeGuard, CryptoAuthentication,

CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN,

In-Circuit Serial Programming, ICSP, INICnet, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, memBrain, Mindi, MiWi,

motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM,

PICDEM.net, PICkit, PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI,

SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are

trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries.

GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other

countries.

All other trademarks mentioned herein are property of their respective companies.

ISBN: 978-1-5224-4560-9

EVB-USB4X12

EVALUATION BOARD

USER’S GUIDE

 2019 Microchip Technology Inc. DS50002889A-page 3

Table of Contents

Preface ........................................................................................................................... 5

Introduction............................................................................................................ 5

Document Layout .................................................................................................. 5

Conventions Used in this Guide ............................................................................ 6

The Microchip Web Site ........................................................................................ 7

Development Systems Customer Change Notification Service ............................ 7

Customer Support ................................................................................................. 7

Document Revision History ................................................................................... 8

Chapter 1. Overview

1.1 USB4712/USB4912 General Introduction ...................................................... 9

1.2 About EVB-USB4x12 ..................................................................................... 9

1.3 References ................................................................................................... 12

1.4 Acronyms and Definitions ............................................................................. 12

Chapter 2. Getting Started

2.1 Introduction ................................................................................................... 15

2.2 Kit Contents .................................................................................................. 15

2.3 Quick Start .................................................................................................... 15

2.3.1 Power Source ............................................................................................ 15

2.3.2 Default Firmware ....................................................................................... 15

2.3.3 Host Connection ........................................................................................ 16

2.3.4 Downstream Port Connections .................................................................. 16

Chapter 3. Hardware Configuration Options

3.1 Hardware Configuration Options .................................................................. 17

3.1.1 Configuration ............................................................................................. 17

3.1.2 Power Source ............................................................................................ 18

3.1.3 Board Power .............................................................................................. 18

3.1.4 Reset ......................................................................................................... 18

3.1.5 USB Ports .................................................................................................. 19

3.1.6 Spare GPIOs ............................................................................................. 19

3.1.7 SMBus/I2C Slave ...................................................................................... 20

3.1.8 USB to SMBus/I2C Master ........................................................................ 20

3.1.9 LED Indicators ........................................................................................... 21

3.1.10 Switches .................................................................................................. 21

3.1.11 Connector Descriptions ........................................................................... 22

3.1.12 Test Points .............................................................................................. 22

Appendix A. PCB Layers

A.1 Introduction .................................................................................................. 23

Appendix B. Schematics

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 4  2019 Microchip Technology Inc.

B.1 Introduction .................................................................................................. 27

Appendix C. Bill of Materials

C.1 Introduction .................................................................................................. 33

Worldwide Sales and Service .....................................................................................38

EVB-USB4X12

EVALUATION BOARD

USER’S GUIDE

 2019 Microchip Technology Inc. DS50002889A-page 5

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

USB4712/USB4912. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• The Microchip Web SiteThe Microchip Web Site

• Development Systems Customer Change Notification Service

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the EVB-USB4x12 Evaluation Board as a

development tool for the USB4712/USB4912 1-Port USB 2.0 automotive hubs. The

manual layout is as follows:

• Chapter 1. “Overview” – This shows a brief description of the EVB-USB4x12

Evaluation Board.

• Chapter 2. “Getting Started” – This includes instructions on how to get started

with the EVB-USB4x12 Evaluation Board.

• Chapter 3. “Hardware Configuration Options” – This provides information

about the EVB-USB4x12 Evaluation Board battery charging features.

• Appendix A. “PCB Layers” – This appendix shows the EVB-USB4x12 Evalua-

tion Board PCB layers.

• Appendix B. “Schematics” – This appendix shows the EVB-USB4x12 Evalua-

tion Board schematics.

• Appendix C. “Bill of Materials” – This appendix includes the EVB-USB4x12

Evaluation Board Bill of Materials (BOM).

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and

documentation are constantly evolving to meet customer needs, so some actual dialogs

and/or tool descriptions may differ from those in this document. Please refer to our web site

(www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each

page, in front of the page number. The numbering convention for the DS number is

“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the

document.

For the most up-to-date information on development tools, see the MPLAB

IDE online help.

Select the Help menu, and then Topics to open a list of available online help files.

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 6  2019 Microchip Technology Inc.

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB

IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

“Save project before build”

Underlined, italic text with

right angle bracket

A menu path File>Save

Bold characters A dialog button Click OK

A tab Click the Power tab

N‘Rnnnn A number in verilog format,

where N is the total number of

digits, R is the radix and n is a

digit.

4‘b0010, 2‘hF1

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

Constants 0xFF, ‘A’

Italic Courier New A variable argument file.o, where file can be

any valid filename

Square brackets [ ] Optional arguments mcc18 [options] file

[options]

Curly brackets and pipe

character: { | }

Choice of mutually exclusive

arguments; an OR selection

errorlevel {0|1}

Ellipses... Replaces repeated text var_name [,

var_name...]

Represents code supplied by

user

void main (void)

{ ...

}

Preface

 2019 Microchip Technology Inc. DS50002889A-page 7

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web

site is used as a means to make files and information easily available to customers.

Accessible by using your favorite Internet browser, the web site contains the following

information:

• Product Support – Data sheets and errata, application notes and sample

programs, design resources, user’s guides and hardware support documents,

latest software releases and archived software

• General Technical Support – Frequently Asked Questions (FAQs), technical

support requests, online discussion groups, Microchip consultant program

member listing

• Business of Microchip – Product selector and ordering guides, latest Microchip

press releases, listing of seminars and events, listings of Microchip sales offices,

distributors and factory representatives

DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE

Microchip’s customer notification service helps keep customers current on Microchip

products. Subscribers will receive e-mail notification whenever there are changes,

updates, revisions or errata related to a specified product family or development tool of

interest.

To register, access the Microchip web site at www.microchip.com, click on Customer

Change Notification and follow the registration instructions.

The Development Systems product group categories are:

• Compilers – The latest information on Microchip C compilers, assemblers, linkers

and other language tools. These include all MPLAB C compilers; all MPLAB

assemblers (including MPASM assembler); all MPLAB linkers (including MPLINK

object linker); and all MPLAB librarians (including MPLIB object librarian).

• Emulators – The latest information on Microchip in-circuit emulators. This

includes the MPLAB REAL ICE and MPLAB ICE 2000 in-circuit emulators.

• In-Circuit Debuggers – The latest information on the Microchip in-circuit

debuggers. This includes MPLAB ICD 3 in-circuit debuggers and PICkit 3 debug

express.

• MPLAB IDE – The latest information on Microchip MPLAB IDE, the Windows

Integrated Development Environment for development systems tools. This list is

focused on the MPLAB IDE, MPLAB IDE Project Manager, MPLAB Editor and

MPLAB SIM simulator, as well as general editing and debugging features.

• Programmers – The latest information on Microchip programmers. These include

production programmers such as MPLAB REAL ICE in-circuit emulator, MPLAB

ICD 3 in-circuit debugger and MPLAB PM3 device programmers. Also included

are non-production development programmers such as PICSTART Plus and

PIC-kit 2 and 3.

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 8  2019 Microchip Technology Inc.

Customers should contact their distributor, representative or field application engineer

(FAE) for support. Local sales offices are also available to help customers. A listing of

sales offices and locations is included in the back of this document.

Technical support is available through the web site at:

http://www.microchip.com/support

DOCUMENT REVISION HISTORY

Revisions Section/Figure/Entry Correction

DS50002889A

(05-29-19)

Initial release

EVB-USB4X12

EVALUATION BOARD

USER’S GUIDE

 2019 Microchip Technology Inc. DS50002889A-page 9

Chapter 1. Overview

1.1 USB4712/USB4912 GENERAL INTRODUCTION

The USB4712/USB4912 hub controller is a 1-port USB2.0 smart hub controller, which

is fully compliant with the USB2.0 Specification. The 1-port hub supports 480 Mbps

High-Speed (HS), 12 Mbps Full-Speed (FS) and 1.5 Mbps Low-Speed (LS) USB

signaling.

USB4712: The USB4712 is a 1-port retimer hub with AutoFlexConnect technology.

This hub is design for use within automotive systems which require an attached smart

phone to assume the host role when docked to the automotive head unit system.

AutoFlexConnect technology allows this hub to actively seek for a host connection on

both the default upstream or default downstream port. If a host is detected on the

default downstream port, but no host is detected on the default upstream port, then the

hub will automatically reconfigure itself and initiate FlexConnect to allow the host

detected on the default downstream port to enumerate the hub and any devices

attached to the USB4712 default upstream port. This allows a functional role swap

between the head unit and the smart phone to occur with no direct role swap com-

mands issued to the USB4712. This hub also supports BC1.2 battery charging on the

default downstream port.

USB4912: The USB4912 is a 1-port hub with Multi-Host Endpoint Reflector technology.

This hub is designed for use within automotive systems which require an attached

smartphone to assume the host role when docked to the automotive head unit system.

With Multi-Host Endpoint Reflector technology, both the automotive head unit and the

smartphone may operate as USB hosts at the same time while exchanging data. A

command issued from the automotive head unit directed to the USB4912’s internal Hub

Feature Controller device is all that is needed to initiate a Multi-Host Endpoint Reflector

session. This hub also supports BC1.2 battery charging on the downstream port. The

USB4912 also has a secondary ‘remote port’ which can be used to daisy chain addi-

tional USB4912 hubs.

The USB4712/USB4912 smart hubs both have an embedded MCU for enabling

advanced features. These features include, hub configuration through upstream USB

interface, USB-to-I

C Bridging, USB-to-SPI Bridging, USB-to-GPIO Bridging and more.

1.2 ABOUT EVB-USB4X12

Figure 1-1 shows a rendering of the top side of EVB-USB4x12.

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 10  2019 Microchip Technology Inc.

FIGURE 1-1: EVB-USB4X12 TOP

Figure 1-2 shows a rendering of the bottom side of EVB-USB4x12.

FIGURE 1-2: EVB-USB4X12 BOTTOM

Overview

 2019 Microchip Technology Inc. DS50002889A-page 11

The EVB-USB4x12 is a 4-layer RoHS-compliant evaluation board that utilizes the

USB4712/USB4912 to provide a fully functional 1-port hub with battery charging capa-

bilities. The EVB-USB4x12 also features the UCS2114 two channel USB port power

controller. The USB4712/USB4912 may optionally execute firmware from an external

SST26VF016B SPI Flash device included in the PCB. Many configurable options may

be controlled through the MPLAB Connect Configurator tool. The EVB-USB4x12

demonstrates driver compatibility with native Microsoft

Windows

, Mac OS

, and

Linux

hub drivers.

The EVB-USB4x12 provides the following features:

• USB4712 or USB4912 in a 40-pin QFN RoHS compliant package

• One UCS2114 in a 20-pin QFN RoHS compliant package

• SST26VF016B in a 8-pin SOIC RoHS compliant package

• USB 2.0 compliant (HS, FS, and LS operation); USB pins are 5V tolerant

• Self-powered (external 5V source) or Bus-powered (powered from USB VBUS)

operation

• One USB2.0 Type-A downstream port on EVB-USB4712. Two USB2.0 Type-A

downstream ports on EVB-USB4912

• Battery Charging support (BC1.2 CDP and DCP) on the downstream port (Port 1

of EVB-USB4912)

• Downstream ports support individual port power and over current sense

• MCP1825 on board +3.3V, 1 Amp regulator

• LED indicators for:

- 3.3V board power

- Downstream port VBUS

- Reset

- SPI chip activity

Figure 1-3 shows the block diagram of the EVB-USB4x12.

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 12  2019 Microchip Technology Inc.

FIGURE 1-3: BLOCK DIAGRAM OF EVB-USB4X12

1.3 REFERENCES

Concepts and materials available in the following documents may be helpful when

reading this document. Visit www.microchip.com for the latest documentation.

• USB4712 Data Sheet

• USB4912 Data Sheet

• AN2651 - Configuration of Microchip USB47xx/USB49xx

1.4 ACRONYMS AND DEFINITIONS

USB4x12

Type-A

mini-B

Terminal Block

SPI

Flash

Type-A

Daisy Chain Port

(USB4912 Only)

UCS2114

MCP1825

3.3V

VBUS VBUS

VBUS

5VIN

USB2.0

TABLE 1-1: ACRONYMS AND DEFINITIONS

Acronym Definition

BC1.2 Latest USB-IF specified USB battery charging standard

CDP Charging Downstream Port. A type of port defined in the

BC1.2 specification which is capable of delivering up to

1.5A of charging at 5V along with USB data.

DCP Dedicated Charging Port. A type of port defined in the

BC1.2 specification which is capable of delivering up to

1.5A of charging at 5V without USB data capabilities.

DFP Downstream Facing Port. On a hub, this is a port that a

device should be attached to.

DP DisplayPort. An interface used to connect transit display

and sound data from a video capable device to a monitor

or display.

EVB Evaluation Board

IC Integrated Circuit

Overview

 2019 Microchip Technology Inc. DS50002889A-page 13

OTP One-Time Programmable Memory

SDP Standard Downstream Port. A type of port defined in the

BC1.2 specification which is capable of delivering up to

500 mA of charging at 5V along with USB data.

Type-A Non-reversible USB connector, used for DFP ports only

USB2.0 Universal Serial Bus Specification 2.0, released April

2000 by USB-IF

USB Universal Serial Bus, a communication technology speci-

fication developed by the USB-IF.

USB-IF USB Integrators Forum, a collection of corporate spon-

sored members responsible for developing USB specifi-

cations

UFP Upstream Facing Port. On a hub, this is a port that should

connect to a USB host

VBUS Refers to the 5V-20V power conductor inside of a Type-C

cable, the power pins on a USB connector, or the USB

power traces on a PCB

TABLE 1-1: ACRONYMS AND DEFINITIONS (CONTINUED)

Acronym Definition

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 14  2019 Microchip Technology Inc.

NOTES:

EVB-USB4X12

EVALUATION BOARD

USER’S GUIDE

 2019 Microchip Technology Inc. DS50002889A-page 15

Chapter 2. Getting Started

2.1 INTRODUCTION

The Microchip EVB-USB4x12 is designed for flexible configuration solutions. It can be

configured via default internal register settings, via a downloadable external firmware

to an onboard SPI Flash, or via SMBus.

Microchip provides a comprehensive software programming tool, MPLAB Connect

(MPLABC), for configuring USB4712/USB4912 functions, registers, and OTP memory.

USB4712/USB4912 requires MPLABC version 2.3.0 or greater.

For additional information on the MPLABC programming tool, refer to Software Librar-

ies within the Microchip USB4712/USB4912 product page at www.micro-

chip.com/USB4712 or www.microchip.com/USB4912

2.2 KIT CONTENTS

The EVB-USB4x12 Evaluation Kit includes on the EVB-USB4x12 PCB. This board may

be used with standard USB cabling. The kit also includes one USB Type-A to USB

Mini-B cable.

2.3 QUICK START

2.3.1 Power Source

A power supply is not included with EVB-USB4x12. This board may be powered

directly from VBUS of the USB host, VBUS from the host connected to downstream

port 1, or from an external 5V power supply, which may be connected to J2.

If powering the PCB from a USB host’s VBUS, ensure shunts are installed on J4

between pins [1-2] and [3-4].

If powering the PCB from an external 5V power supply, remove all shunts on J4.

2.3.2 Default Firmware

By default, the hub operates from internal ROM FW image plus the standard fac-

tory-programmed OTP configuration contents. No firmware image is included inside of

the on-board SPI Flash device.

A firmware may be loaded by onto the onboard SPI Flash via USB by using the MPLAB

Connect SPI Flash programming feature. There is no need to program the SPI Flash

before operating the EVB. A special firmware image is only required for systems which

require custom functionality not included in the internal ROM options. D2 labeled “SPI

ACTIVE” should illuminate bright blue while the hub is executing the firmware from the

external SPI Flash.

Note: If you wish to execute firmware from the internal ROM image after a firmware image

has been programmed to the on-board SPI Flash, install a shunt on J6 to disable

access to the SPI Flash device.

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 16  2019 Microchip Technology Inc.

2.3.3 Host Connection

A USB2.0 or host must be connected to the upstream USB Mini-B port J1. A Type-A to

Mini-B cable or a Type-C to Mini-B cable is required to connect the board to a standard

USB host.

2.3.4 Downstream Port Connections

Once host connection is established on the upstream host port and the host issues the

command to the hub to enable downstream port power, devices may be connected to

the downstream port(s) to begin communicating with the USB host.

Downstream port 1 is a standard USB Type-A receptacle. This port includes a 5V

UCS2114 power switch capable of delivering up to 3A of current before over-current

protection is triggered. Diode D4 labeled “VBUS P1” will illuminate when VBUS power

is applied to the port.

Downstream port 2 is available on USB4912 only, and includes a standard USB Type-A

receptacle. This port is intended to connect another hub tier. It is not intended to oper-

ate as a standard USB port as it does not have individual power enable and overcurrent

detection functionality. This port is also powered from the 5V UCS2114 power switch

device and is ‘always on’.

EVB-USB4X12

EVALUATION BOARD

USER’S GUIDE

 2019 Microchip Technology Inc. DS50002889A-page 17

Chapter 3. Hardware Configuration Options

3.1 HARDWARE CONFIGURATION OPTIONS

3.1.1 Configuration

3.1.1.1 RUNNING FROM INTERNAL ROM FIRMWARE

By default, the hub firmware of the USB4712/USB4912 executes from internal ROM

memory.

To force the hub to boot from the internal ROM, install a shunt onto J6.

3.1.1.2 EXTERNAL SPI FLASH

The USB4712/USB4912 may optionally execute firmware from an external SPI Flash.

A firmware image may be programmed to the external SPI Flash via the MPLAB Con-

nect Configurator tool. After programming and executing a firmware image from an

external SPI Flash, the firmware revision can be quickly identified by enumerating the

EVB-USB4x12 to a USB host PC and inspecting the USB Device ID (bcdDevice) of the

USB2.0 hub. See Figure 3-1.

In order to boot from SPI Flash properly, the following conditions must be met:

• A valid firmware image must be programmed into the SPI Flash device

• Remove any shunt installed on J6

FIGURE 3-1: COMPONENTS CRITICAL FOR EXTERNAL SPI FLASH

FIRMWARE EXECUTION

The recommended sequence for reprogramming the SPI firmware is:

1. Install a shunt onto J6 to force booting from internal ROM memory.

2. Reset the USB4712/USB4912.

3. Connect EVB-USB4x12 to a USB host PC with a USB Type-A to Type-C cable.

4. Boot the MPLAB Connect software and select the new firmware image.

5. Remove the shunt on J6.

6. Click the program button in MPLAB Connect.

SPI ACTIVITY

LED

(D2)

SPI DISABLE

HEADER

(J6)

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 18  2019 Microchip Technology Inc.

3.1.2 Power Source

The EVB-USB4x12 must be powered externally through the J1 4-Pin DIN connector,

or through the J5 terminal block.

The supported input voltage range for the base board is 12V to 24V. By default, the sup-

plied PM-PD requires an input of 24V to properly regulate up to 20V volts to the

upstream PD ports. The recommend input voltage is 24V unless an alternate PM-PD

and/or a specialized hub firmware is used.

A power supply is not included with the EVB-USB4x12.

3.1.3 Board Power

The board includes LED indicators to indicate if all board power nets are working and

includes test loops for quick measurements. The location of these LEDs and test loops

are shown in Figure 3-2 below.

FIGURE 3-2: BOARD POWER LEDS AND TEST LOOPS)

3.1.4 Reset

An on-board reset button (SW1) is included, and this resets the USB4712/USB4912

when pressed. A red LED indicator (D3) also illuminates when the reset signal is

asserted (active low). The locations of these components are shown in Figure 3-3

below.

FIGURE 3-3: RESET BUTTON LOCATION

3.3V

3.3V LED

GROUND

INDICATOR

TEST

POINT

TP2

TEST

POINTS

TP1

TP5

TP6

RESET LED

RESET BUTTON

SW1

Hardware Configuration

 2019 Microchip Technology Inc. DS50002889A-page 19

3.1.5 USB Ports

The following is a list of capabilities for each USB port on the EVB-USB4x12.

• Port 0:

- Data upstream port (connects to a USB host)

- USB2.0 Mini-B receptacle

- USB2.0 data connectivity

• Port 1:

- Data downstream port with AutoFlex (USB4712) or multi-host endpoint reflec-

tor (USB4912)

- USB2.0 Type-A receptacle

- USB2.0 data connectivity

- BC1.2 charging at up to 7.5W (5V at 1.5A)

• Port 2:

- Downstream Type-A receptacle

- USB2.0 data connectivity

Figure 3-4 shows the top view of the EVB-USB4x12.

FIGURE 3-4: EVB-USB4X12 USB PORTS

3.1.6 Spare GPIOs

The EVB-USB4x12 includes 4 GPIOs for USB to GPIO or SMBus/I

C Slave to GPIO

use. These pins are connected to J5 1x6 header. See Figure 3-5.

PORT

EVB-USB4x12 Evaluation Board User’s Guide

DS50002889A-page 20  2019 Microchip Technology Inc.

FIGURE 3-5: SPARE GPIOS

3.1.7 SMBus/I

C Slave

An SMBus/I

C slave interface is available to configure or retrieve status from the

USB4712/USB4912 hub. Pull-up resistors must be sensed by the hub at power on in

order for the SMBus/I

C slave interface to be active. If both SDA and SCL are not

sensed as high upon power-on/reset, the SMBus/I

C slave interface is disabled. See

Figure 3-6.

FIGURE 3-6: USB TO SMBUS/I

C SLAVE HEADER LOCATIONS

3.1.8 USB to SMBus/I

C Master

A USB to SMBus/I

C master interface is available to allow for the USB host to read or

write data to an attached SMBus/I

C slave device. The on-board UCS2114 is con-

nected to the SMBus/I

C bus and is address 57h – 1010_111(r/w). An optional external

slave device may be attach to the board through fly wires by connected to TP3 (DAT)

and TP4 (CLK).

The USB to SMBus/I

C feature may be tested with the MPLAB Connect Configurator

tool, available from the Microchip website. See Figure 3-7.

SPARE GPIO

HEADER

SLAVE DATA

(J5-5)

SLAVE CLOCK

(J5-6)

Page is loading ...

Microchip Technology EVB-USB4x12 User manual

Brand: Microchip Technology

Model: EVB-USB4x12

Type: User manual

USB 2.0 compliant operation
Support for up to 4 downstream ports
Integrated PHY for USB 2.0 operation
Low power consumption
Programmable LED indicators
On-board reset circuitry

Download PDF

report

Microchip Technology EVB-USB4x12 User manual

Microchip Technology EVB-USB4x12 User manual

Related papers

Other documents