Microchip Technology ATECC608A Manuale utente

DT100104

ATECC608A Trust Development Board User's Guide

Introduction

The ATECC608A Trust Development Board is an add-on board for the CryptoAuth Trust Platform and other Microchip

development platforms that contain a MikroElektronika mikroBUS™ header. The board connects to any board that

has a host mikroBUS connection. This board provides an alternative to the sample units that require a socket board

to perform initial development and testing.

The ATECC608A Trust Development Board contains the ATECC608A-TNGTLS (Trust&GO), ATECC608A-TFLXTLS

(TrustFLEX) and ATECC608A-MAHDA (TrustCUSTOM) secure elements. This provides a user the ability to develop

solutions with any of these devices based on the requirements of the application. The user’s guide provides a

physical overview of the connections and switch settings implemented on the board.

Figure 1. Front View Figure 2. Back View

Table of Contents

Introduction.....................................................................................................................................................1

1. Hardware Description..............................................................................................................................3

1.1. Schematic and Key Features....................................................................................................... 3

1.2. Device Selection...........................................................................................................................3

1.3. Hardware Documentation.............................................................................................................4

2. Connecting the Board............................................................................................................................. 6

2.1. CryptoAuth Trust Platform Connections.......................................................................................6

2.2. Xplained Pro Connections............................................................................................................7

3. Document Revision History.....................................................................................................................9

The Microchip Website.................................................................................................................................10

Product Change Notification Service............................................................................................................10

Customer Support........................................................................................................................................ 10

Microchip Devices Code Protection Feature................................................................................................ 10

Legal Notice................................................................................................................................................. 10

Trademarks...................................................................................................................................................11

Quality Management System....................................................................................................................... 11

Worldwide Sales and Service.......................................................................................................................12

DT100104

1. Hardware Description

1.1 Schematic and Key Features

• One ATECC608A-TNGTLS Trust&GO Device (U1)

• Three ATECC608A-TFLXTLS Prototype TrustFLEX Devices (U2, U3, U4)

• Four ATECC608A-MAHDA TrustCUSTOM Devices (U5, U6, U7, U8)

• Two 4-Position SPST DIP Switches for Device Selection (SW1, SW2)

• One mikroBUS Connector (J1, J2)

• On-Board 4.7k I2C Pull-Up Resistors (R9, R10)

• On-Board LED Power Indicator (LD1)

• Zero-Ohm Resistor Jumpers to Select a 3.3V or 5V Power (3.3V Enabled by Default via R12)

Note: To enable a 5V power, remove R12 and solder a zero-ohm resistor into R11.

Figure 1-1. ATECC608A Trust Development Board Schematic

1.2 Device Selection

Devices Hardware Selection

Each secure element has a switch connection that enables the user to select a given device. Slide the DIP switch to

the ON state to enable the device selection. Selecting the device connects the corresponding SDA line through the

DIP switch. The SCL signals of all eight devices are connected together. A large value pull-up resistor on each SDA

line of each device keeps the device in a low-current state when not selected. Note that the switch number shown on

the top of the board (not the number on the switch) corresponds to the device identifier U# on the back of the

board.

DT100104

Hardware Description

Figure 1-2. Device Selection

SW1: Switches 1-4

SW2: Switches 5-8

Table 1-1. Device Selection Switches

Switch # DIP Switch Secure Element Trust Element Type

SW1 1 ATECC608A-TNGTLS Trust&GO

2, 3, 4 ATECC608A-TFLXTLS TrustFLEX

SW2 5, 6, 7, 8 ATECC608A-MAHDA TrustCUSTOM

Devices Software Selection

Once a specific device is selected, a specific I2C address must be used to address the given device type. While each

device is initially programmed with a default I2C address, it is possible to overwrite this address. See the specific

device data sheets for more information.

Table 1-2. Default I2C Addresses

Device Default 7-bit I2C Address 8-bit Programmed I2C Address Value(1)

ATECC608A-TNGTLS 0x35 0x6A

ATECC608A-TFLXTLS 0x36 0x6C

ATECC608A-MAHDA 0x60 0xC0

Note:

1. This is the I2C_Address byte value programmed into the ATECC608A device.

Note that multiple devices can be enabled provided they have different I2C addresses. If multiple devices with the

same address are selected, a failure occurs due to a conflict on the I2C bus.

1.3 Hardware Documentation

Additional documentation for the kit can be found on the Microchip website for the ATECC608A Trust (DT100104)

development kit.

DT100104

Hardware Description

This includes:

1. Board design documentation including schematics/3D views.

2. Gerber files.

3. ATECC608A Trust Development Board User’s Guide.

DT100104

Hardware Description

2. Connecting the Board

The form factor of the ATECC608A Trust Development Board was chosen because Microchip has heavily adopted

the use of the mikroBUS connector on host boards. Many of Microchip’s development platforms will support one or

more mikroBus interfaces. These include:

• Microchip Explorer 16/32 Development Board

• MPLAB® Xpress Evaluation Board

• Automotive Networking Development Board

• PIC® Curiosity Boards

• PIC Curiosity Nano Boards

• AVR® Curiosity Nano Boards

2.1 CryptoAuth Trust Platform Connections

The ATECC608A Trust Development Board has an I2C connection through the mikroBUS header that enables it to

connect to the mikroBUS host header present on the Trust Platform, or any of the PIC/AVR/SAM MCU host

development boards that have a mikroBUS header.

Connecting the ATECC608A Trust Development Board to the CryptoAuth Trust Platform

1. Set the switches on the CryptoAuth Trust Platform to enable the mikroBUS header and disable the on-board

devices. This setting is highlighted in Bold and Italic below:

Switch Settings What is Enabled

SW2_1 SW2_2 mikroBUS™ Header On-Board Devices

ON ON Yes Yes

OFF ON No Yes

ON OFF Yes No

OFF OFF No No

2. Connect the two boards as shown in Figure 2-1.

DT100104

Connecting the Board

Figure 2-1. ATECC608A Trust Connected to a CryptoAuth Trust Platform Development Board

Attention: The angled notch on the ATECC608A Trust Development Board must be aligned with

the angled line on the silk screen near the mikroBUS connector.

3. Select the device that you want to connect to the host via the DIP switches shown on the ATECC608A Trust

Development Board. Switch 3 is on and all others are off. This selects an ATECC608A-TFLXTLS device.

4. Connect a USB cable between the CryptoAuth Trust Platform on the host system where the software is

developed.

5. Invoke the software tools for the given application or the use case that is being developed.

2.2 Xplained Pro Connections

Some Microchip development boards support only the Xplained Pro extension headers. Through use of an adapter

board, the ATECC608A Trust Development Board can still be used. Figure 2-2 shows the full assembly of the

ATECC608A Trust Development Board, the ATMBUSADAPTER-XPRO and an ATSAMD21-XPRO Development

Board.

DT100104

Connecting the Board

Figure 2-2. Connections to an Xplained Pro Development

Platform

1. ATECC608A Trust Development

Board

2. ATMBUSADAPTER-XPRO

3. ATSAMD21-XPRO Development

Board

4. TARGET USB Port

5. DEBUG USB Port

How to Connect the ATECC608A Trust Development Board to an Xplained Pro Host Board

1. Connect the ATMBUSADAPTER to the ATECC608A Trust Development Board as shown in Figure 2-2.

2. Connect the combined ATMBUSADAPTER and ATECC608A Trust Development Board to one of the XPRO

extension connectors on the host board. EXT1 has been used in Figure 2-2.

3. Set the switch or switches on the ATECC608A Trust Development Board to enable the device you want to

connect to.

Note: The switch settings, as shown, enable one each of the ATECC608A-TNGTLS, ATECC608A-TFLXTLS

and ATECC608A-MAHDA TrustCUSTOM devices. This is legal because all the I2C addresses for the selected

devices are unique. In general, only one device will be selected.

4. Connect the USB cables to the TARGET USB Port and the DEBUG USB Port and the host system.

5. Invoke the appropriate software development tools for the application.

DT100104

Connecting the Board

3. Document Revision History

Revision A (September 2019)

• Initial release of this document

DT100104

Document Revision History

The Microchip Website

Microchip provides online support via our website at http://www.microchip.com/. This website is used to make files

and information easily available to customers. Some of the content available includes:

•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 design partner 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

Product Change Notification Service

Microchip’s product change notification service helps keep customers current on Microchip products. Subscribers will

receive email notification whenever there are changes, updates, revisions or errata related to a specified product

family or development tool of interest.

To register, go to http://www.microchip.com/pcn and follow the registration instructions.

Customer Support

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Embedded Solutions Engineer (ESE)

• Technical Support

Customers should contact their distributor, representative or ESE for support. Local sales offices are also available to

help customers. A listing of sales offices and locations is included in this document.

Technical support is available through the website at: http://www.microchip.com/support

Microchip Devices Code Protection Feature

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.

Legal Notice

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

DT100104

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