DM320118
CryptoAuth Trust Platform User's Guide
Introduction
The Microchip CryptoAuth Trust Platform is the newest addition to the CryptoAuthentication™ evaluation kits. This kit
is used for exploring and developing solutions for the IoT space with a pre-provisioned ATECC608A Trust&GO, preconfigured TrustFLEX and fully customizable TrustCUSTOM products.
The Trust&GO and TrustFLEX products have been developed to allow for an easy way to add hardware security to
IoT Cloud solutions. Using the kit with the Microchip development tools and provisioning systems allows for
customers with low volume projects to easily and readily implement secure authentication into their application.
This user guide provides a physical overview of the connections, components and features associated with the
CryptoAuth Trust Platform development kit.
Figure 1. CryptoAuth Trust Platform
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 1
DM320118
Table of Contents
Introduction.....................................................................................................................................................1
1. Hardware Overview.................................................................................................................................3
1.1. Kit Ordering Code and Components............................................................................................ 3
1.2. Functional Description..................................................................................................................4
1.3. Hardware Documentation.............................................................................................................5
2. mikroBUS™ and Click Add-On Boards................................................................................................... 6
3. Software Requirements...........................................................................................................................8
3.1. Software Application Development.............................................................................................. 8
3.2. Firmware Upgrade........................................................................................................................8
4. Document Revision History...................................................................................................................10
The Microchip Website................................................................................................................................. 11
Product Change Notification Service............................................................................................................11
Customer Support........................................................................................................................................ 11
Microchip Devices Code Protection Feature................................................................................................ 11
Legal Notice..................................................................................................................................................11
Trademarks.................................................................................................................................................. 12
Quality Management System....................................................................................................................... 12
Worldwide Sales and Service.......................................................................................................................13
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 2
1. Hardware Overview
9
8
7
6
5
4
3
2
1
4
The CryptoAuth Trust Platform consists of a Microchip SAM D21 microcontroller configured as the main MCU. It
comes pre-programmed with Microchip`s Secure Products Group (SPG) kit protocol. This protocol facilitates the
communication between the CryptoAuthentication devices and the host MCU over the USB HID interface. The data
transfer between the secure elements and the host MCU is indicated by the Status LED.
The trust platform consists of three secure elements: ATECC608A-TNGTLS (Trust&GO), ATECC608A-TFLXTLS
Prototype (TrustFLEX) and ATECC608A-MAHDA (TrustCUSTOM). Each of the secure elements has a different I2C
address that enables its communication with the host MCU, which eliminates the line contention issue.
Figure 1-1. CryptoAuth Trust Platform Board Components
DM320118
Hardware Overview
1.1 Kit Ordering Code and Components
1. USB Connector
2. nEDBG On-board Debugger
3. ATSAMD21E18A Host MCU
4. mikroBUS™ Headers
5. Power and Status LEDs
6. Dual SPST DIP Switch
7. ATECC608A Secure Elements
8. Reset Switch
9. USB2422 Dual Port Hub
Ordering Information
Kit Name: CryptoAuth Trust Platform Development Kit
Ordering Code: DM320118
Availability: The kit will be available from Microchip Direct and multiple distributors.
CryptoAuth Trust Platform Kit Contents and Requirements
The CryptoAuth Trust Platform Kit contains:
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 3
• CryptoAuth Trust Platform board
A micro USB cable (not included) is required to operate the board.
1.2 Functional Description
The block diagram in Figure 1-2 illustrates the major connections of the CryptoAuth Trust Platform. For additional
details refer to the board schematics referenced in section 1.3 Hardware Documentation of the document.
Figure 1-2. Block Diagram
DM320118
Hardware Overview
ATECC608A
Secure
Elements
I2C
SPI
SWI/(Tx/Rx)
mikroBUS
Header
USB Upstream
USB2422
Hub
USB DN1
USB DN2
Host MCU
ATSAMD21E18A
SWD
nEDBG
TX/RX
Debugger
Main Board Components
• ATSAMD21: The Microchip SAM D21 is an ARM® Cortex M0+ based microcontroller. The MCU connects to the
three secure elements via I2C. The mikroBUS header has I2C, SPI, UART, GPIO and analog connections to the
microcontroller. This enables the possibility of using the CryptoAuth Trust Platform with many types of
MikroElektronika Click boards™.
• Secure Elements: The Trust Platform consists of three ATECC608A-based ICs, as listed in the following table.
Please refer to the specific data sheets associated with each of these devices for more details.
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.
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 4
DM320118
Hardware Overview
• mikroBUS Header: The mikroBUS header is a pre-defined header connection for all the MikroElektronika
boards. This lets the user connect many types of Click sensors and add-on boards to the Trust Platform. The
Trust Platform has SPI, I2C, UART and GPIO and analog connections to the host microcontroller.
• DIP Switch: The switch is used to select between the on-board ATECC608A Trust Platform devices and the
mikroBUS header. The switches disconnect the SDA lines of the I2C interface to prevent conflict in case two I2C
addresses are the same. Both switches can be enabled if all I2C addresses are unique on all devices connected
to the board.
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
• nEDBG Debugger: The debugger is used to program and flash the host MCU. Debug information can also be
read back from the host MCU through the debugger interface. When plugged into the system and opened with
MPLAB X IDE, the nEDBG debugger will show up with a serial number of MCHP3311xxxxxxxxxxxxxxx.
• USB Hub: The Microchip USB2422 is a dual-port USB hub. The hub will pass data between the upstream port
and the downstream devices. The downstream devices are the debugger and the host MCU.
1.3 Hardware Documentation
Additional documentation for the kit can be found on the Microchip Website for the DM320118.
This includes:
1. Board Design Documentation including Schematics and 3D Views
2. Gerber Files
3. CryptoAuth Trust Platform User’s Guide (DM320118)
4. Trust Platform Design Suite Tools
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 5
2. mikroBUS™ and Click Add-On Boards
The mikroBUS connector is emerging as a de facto industry-standard add-on board form factor. The CryptoAuth Trust
Platform board has a single mikroBUS host connector. Having this capability dramatically expands the usefulness of
this board for developing and prototyping new applications. All of the boards listed in Table 2-1 have been developed
by MikroElektronika, except as noted.
Table 2-1. mikroBUS Add-on Boards
Board Name Devices Supported Manufacturer Description
DM320118
mikroBUS™ and Click Add-On Boards
ATECC608A
DT100104
Secure UDFN
click
Secure SOIC
click
WiFi 7 click ATWINC1510 MikroElektronika WiFi module utilizing the ATWINC510. The board
Secure 4 click ATECC608A MikroElektronika Has a generic ATECC608A secure element with an
Secure click ATECC508A MikroElektronika Has a generic ATECC508A secure element with an
(1)
ATECC608A-TNGTLS
ATECC608A-TFLXTLS
ATECC608A-MAHDA
All Microchip
CryptoAuthentication
devices
All Microchip
CryptoAuthentication
devices
Microchip The ATECC608A Trust board provides additional
sample units for doing development work. This
board was developed as an alternative to using
socketed boards. Each of the devices can be
individually selected using the on-board DIP
switches.
MikroElektronika The secure UDFN Click board™ has been
developed as an 8-pin UDFN socketed solution for
configuring and provisioning CryptoAuthentication
devices. These devices may be used to mount to
early prototype or production boards.
MikroElektronika The secure SOIC click board has been developed
as an 8-pin SOIC socketed solution for configuring
and provisioning CryptoAuthentication devices.
These devices may be used to mount to early
prototype or production boards.
supports IEEE® 802.11 b/g/n protocols and
communicates over the SPI interface.
I2C interface. This device is the same as the
ATECC608A TrustCustom device that is mounted on
the CryptoAuth Trust Platform board.
I2C interface.
™
Secure 3 click ATSHA204A MikroElektronika Has a generic ATSHA204A secure element with an
I2C interface. The device has a cryptographic
coprocessor with symmetric secure hardware-based
key storage.
Secure 6 click ATSHA204A MikroElektronika Has a generic ATSHA204A secure element with a
SWI interface. The device has a cryptographic
coprocessor with symmetric secure hardware based
key storage.
Secure 2 Click ATAES132A MikroElektronika Has a generic ATAES132A secure element with an
I2C Interface. The ATAES132A is a 32K serial
EEPROM that can be configured as a secure
memory device.
mikroBUS
Shuttle
© 2019 Microchip Technology Inc.
Click expansion boards MikroElektronika The mikroBUS Shuttle is a small add-on board that
can be used to expand the mikroBUS to multiple
mikroBUS connectors.
User Guide
DS50002921A-page 6
DM320118
mikroBUS™ and Click Add-On Boards
...........continued
Board Name Devices Supported Manufacturer Description
Shuttle Click Click expansion boards MikroElektronika The Shuttle Click is a socket expansion board that
provides an elegant solution for stacking up to four
Click boards.
Note:
1. Manufactured by Microchip.
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 7
3. Software Requirements
The CryptoAuth Trust Platform can be used in a variety of ways. These include:
1. As a development tool in conjunction with Microchip’s Trust Platform Design Suite of use case tools.
2. As a development and demonstration platform for Microchip predefined applications.
3. As a development platform to develop your own applications using Microchip’s Python-based tools or C-based
tools.
Various software tools are available to work with the CryptoAuth Trust Platform.
3.1 Software Application Development
The following tools are useful for developing or modifying applications.
Trust Platform Design Suite
The Microchip Trust Platform Design Suite of use case tools are based on Jupyter Notebooks and Python programs
to allow a developer to quickly define and develop applications for the Trust Platform products.
The Microchip Trust Platform Design Suite provides the ability to inter-operate with the on-board ATECC608A
CryptoAuthentication devices or CryptoAuthentication devices attached through the mikroBUS header. The tool
provides an easy way to select from available device options and generate the required configuration files needed for
provisioning. The tool can also be used to develop applications utilizing the CryptoAuth Trust Platform.
DM320118
Software Requirements
MPLAB® X IDE
MPLAB X is an Integrated Development Environment (IDE) that works on Windows®, macOS®, and Linux
environments. The tools can be used to develop new embedded applications using the onboard SAM D21
microcontroller. The tool will automatically make use of the onboard nEDBG debugger to program the SAM D21
microcontroller. The debugger can also be used to provide debug information back from the host microcontroller to a
terminal window through a COM port.
Atmel Studio 7
Atmel Studio 7 is an Integrated Development Environment (IDE) that works on Windows® environments. The tools
can be used to develop new embedded applications using the onboard SAM D21 microcontroller. The tool will
automatically make use of the onboard nEDBG debugger to program the SAM D21 microcontroller. The debugger
can also be used to provide debug information back from the host microcontroller to a terminal window through a
COM port.
CryptoAuthLib
CryptoAuthLib was developed to make working with Microchip’s CryptoAuthentication devices a simple and
straightforward process. CryptoAuthLib has been designed with a Hardware Abstraction Layer (HAL) to make it easily
extensible to other microcontrollers. Both C and Python versions of the library are available. The Python version of
the library is maintained by Microchip and available through the PythonPackage Index website (pypi.org). The most
recent version of CryptoAuthLib can be found on Microchip’s GitHub site.
• CryptoAuthLib - Python
• CryptoAuthLib - GitHub
3.2 Firmware Upgrade
®
New firmware for the CryptoAuth Trust Platform may be available periodically with new features or enhancements. In
addition, specific applications developed by Microchip may be made available for use with this development board.
The latest version of the firmware and information about other applications will be found on the DM320118 product
page.
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 8
DM320118
Software Requirements
Two Microchip tools exist for upgrading the firmware of the CryptoAuth Trust Platform development kit. Firmware
upgrades are done in the standard way using both tools and are not described in more detail here. Both of these
options utilized the nEDBG on-board debugger. These options are:
• MPLAB X IPE (Integrated Programming Environment) – This tool is provided as part of the MPLAB X IDE
download.
• Atmel Studio 7 – Integrated Design Environment.
Notice: Upgrading to the latest version of the tools is recommended. Older versions of the tool may not
recognize the nEDBG debugger or the specific kit information.
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 9
4. Document Revision History
Revision A (September 2019)
• Initial release of this User’s Guide.
DM320118
Document Revision History
© 2019 Microchip Technology Inc.
User Guide
DS50002921A-page 10
DM320118
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Note the following details of the code protection feature on Microchip devices:
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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection
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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
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User Guide
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DM320118
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All other trademarks mentioned herein are property of their respective companies.
©
2019, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
ISBN: 978-1-5224-5086-3
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