Microchip EVB-LAN8770 RGMII Evaluation Board User Guide

: June 13, 2024
: MICROCHIP

Table of Contents

EVB-LAN8770 RGMII Evaluation Board
Preface
Overview
Getting Started
Hardware Configuration
Appendix A. Schematics
Appendix B. Bill of Materials
Worldwide Sales and Service
References
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Download This Manual (PDF format)

EVB-LAN8770-RGMII
Evaluation Board
User’s Guide

EVB-LAN8770 RGMII Evaluation Board

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All Rights Reserved.
ISBN: 978-1-6683-3048-7
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Preface

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.

INTRODUCTION

This chapter contains general information that will be useful to know before using the EVB-LAN8770-RGMII Evaluation Board User’s Guide. Items discussed in this chapter include:

Document Layout
Conventions Used in this Guide
Warranty Registration
The Microchip Web Site
Development Systems Customer Change Notification Service
Customer Support
Document Revision History

DOCUMENT LAYOUT

This document describes how to use the EVB-LAN8770 RGMII Evaluation Board as a development tool for the LAN8770, 100BASE-T1 Ethernet Transceiver. The manual layout is as follows:

Chapter 1. “Overview” – This shows a brief description of the EVB-LAN8770-RGMII Evaluation Board.
Chapter 2. “Getting Started” – This provides information about the setup and operation of the EVB-LAN8770-RGMII Evaluation Board.
Chapter 3. “Hardware Configuration” – This details the hardware configuration information of the EVB-LAN8770-RGMII Evaluation Board.
Appendix A. “Schematics” – This appendix shows the EVB-LAN8770-RGMII Evaluation Board schematics.
Appendix B. “Bill of Materials” – This appendix includes the

CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description	Represents	Examples

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 ,
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)

{ … }

WARRANTY REGISTRATION
Please complete the enclosed Warranty Registration Card and mail it promptly.
Sending the Warranty Registration Card entitles users to receive new product updates.
Interim software releases are available at the Microchip web site.
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 nonproduction 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
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
DS50003566A (08-30-23)	Initial release

Overview

1.1 INTRODUCTION
The EVB-LAN8770-RGMII Evaluation Board is a plug-in card that interfaces directly with a mating Microchip host processor controller board, such as the SAMA5D3 Ethernet Development System (EDS) board. It features the EVB-LAN8770, a highly integrated networking device that incorporates a 100BASE-T1 physical layer transceiver (PHY). The board’s PHY port is connected to a RJ45 Ethernet jack with integrated magnetics, and the PHY’s RGMII connections are brought out to a high-speed multi-pin (HS) connector.
Together, the EVB-LAN8770-RGMII Evaluation Board and the SAMA5D3-EDS provide a highly-flexible platform for evaluation of basic PHY features via static Control-Status Registers (CSR).
The scope of this document is meant to describe the EVB-LAN8770-RGMII Evaluation Board setup and its user interface features. A simplified block diagram of the board is shown in Figure 1-1.

1.2 BLOCK DIAGRAM

Microchip EVB-LAN8770 RGMII Evaluation Board - BLOCK
DIAGRAM

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.

LAN8770 Data Sheet
LAN8770 Schematics
SAMA5D3 Ethernet Development System Schematics
SAMA5D3 Ethernet Development System Board User’s Guide
EVB-LAN7431-EDS Board User’s Guide
EVB-LAN7801-EDS Board User’s Guide
MIC94052 Data Sheet
VXM7-9013 Data Sheet

1.4 TERMS AND ABBREVIATIONS

The following are the terms and abbreviations used in this document:

CSR – Control Status Registers
DNP – Do Not Populate
EDS – Ethernet Development System
EEPROM – Electronically Erasable Programmable Read-Only Memory
MDC – Management Data Clock
MDIO – Management Data Input/Output
PHY – Physical Layer Transceiver
RGMII – Reduced Gigabit Media Independent Interface
SMI – Serial Management Interface

Getting Started

2.1 INTRODUCTION
The EVB-LAN8770-RGMII Evaluation Board is designed as a plug-in card to interface directly with a mating Microchip host processor or controller board, such as the SAMA5D3-EDS Board, that supplies full power and provides full register access and configuration via MDIO/MDC bus management.

2.2 DEFAULT JUMPER SETTINGS
The EVB-LAN8770-RGMII ships with the necessary jumpers installed for basic operation. These are:

J5: shunt installed between pins [1-2]
J15: shunt installed between pins [1-2]
J16: shunt installed between pins [2-3]
J18: shunt installed between pins [1-2]

See Figure 3.2 for an image of these default shunt installations.
See Section 3.4 “Connectors” for a full list of connector/header descriptions and directions for use.

23 POWER SOURCE
The EVB-LAN8770-RGMII can be completely bus-powered from its mating Microchip host processor or control board. Alternatively, the EVB-LAN8770-RGMII can be powered with an external 3.3V supply.
Refer to Figure 3.2 and the board schematics in Figure A-1 for details.
2.3.1 EDS-Powered Operation
For EDS-powered operation:

J16 needs a jumper on either pins [1-2] for 2.5V operation or pins [2-3] for 3.3V
operation.
Either one of the following two options but not both options:
– J15 [1-2] for normal operation
– J13 [1-2] for TC10 application where INH controls non-VBAT power supplies

2.3.2 External-Powered Operation
For external-powered operation:

Apply 2.5V or 3.3V to J16, pin 2 (center pin).
Either one of the following two options but not both options:
– J15 [1-2] for normal operation
– J13 [1-2] for TC10 application where INH controls non-VBAT power supplies
2023 Microchip Technology Inc. and its subsidiaries
DS50003566A-page 11

2.4 CLOCK
The EVB-LAN8770-RGMII utilizes a 25 MHz crystal to generate input reference clock for the LAN8770 device. Refer to Figure A-1 for details.
2.5 RESET CIRCUIT
2.5.1 Power-On Reset—EDS Reset
The SAMA5D3-EDS can provide the LAN8770 Reset when a jumper is placed on EVB- LAN8770, J18 pins [2-3] (EDS Reset).
2.5.2 Manual Reset
The EVB-LAN8770 SW1 can be pressed and released to provide LAN8770 Reset after device power-up. The EVB-LAN8770-RGMII J18 must have a jumper between pins [1-2] (onboard) to use this manual Reset.
2.6 USING THE EVB-LAN8770-RGMII
2.6.1 With SAMA5D3-EDS
The EVB-LAN8770-RGMII directly plugs into a mating Microchip host controller or processor board, such as the SAMA5D3-EDS, that can deliver full power and provide full register access and configuration via MDIO/MDC bus management.
Together, the EVB-LAN8770 and the SAMA5D3-EDS enable 100 Mbps Ethernet traffic through RGMII and the PHY port of the EVB-LAN8770 device, with the RGMII port connecting to the SAMA5D3 processor and the PHY port connecting via copper Ethernet cable (CAT-5 UTP or better) to external Ethernet devices.
All LAN8770 registers are accessible via MDIO/MDC bus management from the SAMA5D3-EDS Board, enabling full evaluation and firmware for all LAN8770 features. Refer to the SAMA5D3 Ethernet Development System Board User’s Guide.
Figure 2-1 shows the EVB-LAN8770-RGMII connected to the SAMA5D3-EDS board.

Microchip EVB-LAN8770 RGMII Evaluation Board - BOARD

2.6.2 With EVB-LAN7431-EDS
For EVB-LAN7431-EDS to work with the EVB-LAN8770, a specific LAN7431 EEPROM image should be programmed onto the EVB-LAN7431-EDS baseboard.
This is necessary to ensure that RGMII TXC and RXC delays settings are appropriately configured, and the LAN7431’s 125 MHz clock source is enabled.
A readme file that describes the detailed configuration and the binary files used to program the EVB-LAN7431-EDS is available on the EVB-LAN8770-RGMII Evaluation Board product page.
All LAN8770 registers are accessible via MDIO/MDC bus management from the EVB- LAN7431-EDS (through both Windows ® ® and Linux ), enabling full evaluation.
2.6.3 With EVB-LAN7801-EDS
For EVB-LAN7801-EDS to work with the EVB-LAN8770, a specific LAN7801 EEPROM image should be programmed onto the EVB-LAN7801-EDS baseboard.
This is necessary to ensure that RGMII TXC and RXC delay settings are appropriately configured, and the LAN7801’s 125 MHz clock source is enabled.
A readme file that describes the detailed configuration and the binary files used to program the EVB-LAN7801-EDS are available on the EVB-LAN8770-RGMII Evaluation Board product page. All LAN8770 registers are accessible via MDIO/MDC bus management, enabling full LAN8770 evaluation through either of these methods:

EVB-LAN7801-EDS with Windows or Linux
opulate EVB-LAN7801-EDS J15 (MDC).
Populate EVB-LAN7801-EDS J16 (MDIO).
EVB-LAN8770-RGMII
DNP EVB-LAN7801-EDS J15 (MDC).
DNP EVB-LAN7801-EDS J16 (MDIO).
EVB-LAN8770-RGMII J10 (MDC) and J11 (MDIO) for local LAN8770 evaluation with a Serial Management Interface (SMI) tool

Hardware Configuration

3.1 HARDWARE CONFIGURATION OPTIONS
Figure 3-1 shows the top view of the EVB-LAN8770-RGMII.

Microchip EVB-LAN8770 RGMII Evaluation Board -
HARDWARE 3.2 PHY PORT
PHY port (J17) supports 100BASE-T1 operation.
3.3 TEST POINTS
Table 3-1 lists the test points on the EVB-LAN8770-RGMII:
TABLE 3-1: TEST POINTS

Test Point	Description
J1	GND
TP1	GND
TP5	GND
TP6	INH
TP7	VBAT

3.4 CONNECTORS
Table 3-2 lists the connectors on the EVB-LAN8770-RGMII:
TABLE 3-2: CONNECTORS

Connector Reference Designator	Function	Options
J4	MANAGED mode Selection	Closed: LAN8770 is in Managed mode. Open: LAN8770

is in Autonomous mode.
J5| MASTER mode Selection| Closed: LAN8770 is configured as a leader. Open: LAN8770 is configured as a follower.
J8| WAKEIN Jumper| Closed: Allows LAN8770 WAKE_IN access to MAC through J14 RGMII connector.

Open: LAN8770 WAKE_IN is isolated from MAC.

Shunt pins [2-3]: Reset comes from local Reset button (SW1).

Note 1: Only one of J13 or J15 must be populated for LAN8770 power.
2: A shunt must be placed on either [1-2] or [2-3] for LAN8770 power.

Appendix A. Schematics

A.1 INTRODUCTION
This appendix shows the EVB-LAN8770-RGMII Evaluation Board schematics.

Microchip EVB-LAN8770 RGMII Evaluation Board -
SCHEMATIC Microchip EVB-LAN8770 RGMII
Evaluation Board - SCHEMATIC 2

NOTES:

Appendix B. Bill of Materials

B.1 INTRODUCTION
This appendix contains the EVB-LAN8770-RGMII Evaluation Board Bill of Materials (BOM).
TABLE B-1:EVB-LAN8770 RGMII BILL OF MATERIALS

Item| Quantity| Designator| Description| Populated| Manufacturer| Manufacturer Part Number
---|---|---|---|---|---|---
1| 13| C1, C2, C4, C5, C6, C9, C11, C12, C15, C16, C20, C28, C29| CAP CER 0.1uF 35V 10% X7R SMD 0402| YES| TDK Corporation| CGA2B3X7R1V104K050BB
2| 7| C3, C7, C10, C13, C17, C19, C22| CAP CER 1uF 35V 10% X5R SMD 0402| YES| Murata Electronics North America| GRM155R6YA105KE11D
3| 2| C14, C18| CAP HiQ 15pF 50V 5% NP0 2.32GHz SMD 0402| YES| Johanson Technology Inc| 500R07S150JV4T
4| 2| C21, C24| CAP CER 470pF 25V 5% NP0 SMD 0603| YES| Murata Electronics North America| GRM188R61E106MA73D
5| 1| C23| CAP CER 10000pF 16V 10% X7R SMD 0402| YES| KEMET| C0402C103K4RACTU
6| 1| C25| CAP CER 47uF 6.3V 20% X5R SMD 0805v| YES| Taiyo Yuden| JMK212BJ476MG-T
7| 2| C30, C31| CAP CER 0.1uF 250V 10% X7T SMD 0805| YES| TDK Corporation| C2012X7T2E104K125AA
8| 1| C33| CAP CER 4700pF 250V 10% X7R SMD 0805| YES| KEMET| C0805C472KARACAUTO
9| 1| C37| CAP CER 1uF 16V 10% X5R SMD 0603| YES| AVX| 0603YD105KAT2A
10| 1| D1, D2| DIO LED GREEN 2V 30mA 35mcd Clear SMD 0603| YES| Lite-On Inc| LTST-C191KGKT
11| 1| D3| DIO TVS ARRAY PESD2ETH100-TR 24V SMD SOT-23-3| YES| Nexperia| PESD2ETH100-TR
12| 5| FB2, FB3, FB4, FB5, FB6| FERRITE 600R 500mA SMD 0603| YES| Murata Electronics North America| BLM18AG601SH1D
13| 1| J1| CON HDR-2.54 Male 1×1 Gold 5.84MH TH VERT| YES| TE Connectivity| 5-146280-1
14| 1| J3| CON TERMINAL 3.5mm 1×2 Female 16-26AWG 10A TH R/A| YES| On Shore Technology Inc.| OSTTE020104
15| 5| J4, J5, J8, J13, J15| CON HDR-2.54 Male 1×2 Gold 5.84MH TH VERT| YES| FCI| 68001-202HLF
16| 1| J14| CON STRIP High Speed Stacker 5mm Male 2×50 SMD VERT| YES| Samtec| QTS-050-01-L-D-A-GP
17| 2| J16, J18| CON HDR-2.54 Male 1×3 Gold 5.84MH TH VERT| YES| FCI| 68000-103HLF
18| 1| L1| CM CHOKE 5.5R@100kHZ 200UH SMD 3.2X2.5MM| YES| TDJK Electronics| DLW43MH201XK2L
19| 1| Q1| MCHP ANALOG MOSFET SINGLE P-CH MIC94052YC6 2A 0.270WSC70-6| YES| Microchip Technology| MIC94052YC6-TR
20| 1| R1| RES TKF 100R 1% 1/10W SMD 0402| YES| Panasonic Electronic Components| ERJ-2RKF1000X
21| 12| R2, R3, R5, R7, R10, R14, R19, R20, R21, R22, R24, R35| RES TKF 10k 1% 1/10W SMD 0402| YES| Panasonic| ERJ-2RKF1002X
22| 6| R4, R6, R8, R9, R11, R12| RES TKF 22R 1% 1/16W SMD 0402| YES| Yageo| RC0402FR-0722RL
23| 3| R15, R26, R27| RES TKF 1k 5% 1/16W SMD 0402| YES| Yageo| RC0402JR-071KL
24| 4| R16, R17, R18, R28| RES TKF 0R SMD 0402 AEC-Q200| YES| Panasonic| ERJ- 2GE0R00X
25| 3| R23, R30, R33| RES TKF 2.2k 5% 1/16W SMD 0402| YES| Vishay Dale| CRCW04022K20JNED
26| 1| R25| RES TF 100k 1% 1/10W SMD 0603| YES| Yageo| RC0603FR-07100KL
27| 2| R29, R31| RES TF 1k 1% 1/2W SMD 1206| YES| Stackpole Electronics Inc| RNCP1206FTD1K00
---|---|---|---|---|---|---
28| 1| R32| RES TkF 6.49k 0.1% 1/16W SMD 0402| YES| Panasonic Electronics Components| ERA-2ARB6491X
29| 1| R34| RES TKF 100k 1% 1/4W SMD 0603| YES| Vishay| CRCW0603100KFKEAHP
30| 1| SW1| SWITCH TACT SPST-NO 16V 0.05A PTS810 SMD| YES| C&K Components| PTS810 SJM 250 SMTR LFS
31| 1| TP5| CON TP LOOP Black 3.18×5.59 TH| YES| Keystone Electronics| 5006
32| 1| U1| MCHP INTERFACE T1 ETHERNET LAN8770R QFN-36| YES| Microchip Technology| LAN8770R-E/5KXVAO
33| 1| U2| C BUFFER Inverting Schmitt trigger 74AHC1G14GV GATE SGL CMOS SOT-23-5| YES| Nexperia| 74AHC1G14GV,125
34| 1| Y1| MCHP CRYSTAL 25Mhz 10pF SMD L3.2W2.5H0.8| YES| Microchip Technology| VXM7-9013-25M0000000
35| 1| C26| CAP CER 47uF 6.3V 20% X5R SMD 0805| DNP| Taiyo Yuden| JMK212BJ476MG-T
36| 1| C27| CAP CER 10uF 25V 20% X5R SMD 0603| DNP| Murata Electronics North America| GRM188R61E106MA73D
37| 1| FB1| FERRITE 600R 500mA SMD 0603| DNP| Murata Electronics North America| BLM18AG601SH1D
38| 3| J6, J10, J11| CON HDR-2.54 Male 1×1 Gold 5.84MH TH VERT| DNP| TE Connectivity| 5-146280-1
39| 1| J17| CON JACK MINI50 2MM BLACK MALE TH R/A| DNP| Molex, LLC| 0347930040
40| 1| TP1| MISC, TEST POINT MULTI PURPOSE MINI BLACK| DNP| Keystone| 5001
41| 2| TP6, TP7| CON TP LOOP Black 3.18×5.59 TH| DNP| Keystone Electronics| 5006

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DS50003566A-page 24
© 2023 Microchip Technology Inc. and its subsidiaries