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DT100104
ATECC608B Trust Development Board User's Guide
Introduction
The ATECC608B 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 ATECC608B Trust Development Board contains the ATECC608B-TNGTLS ( ), ATECC608B-TFLXTLSTrust&GO
(TrustFLEX) and ATECC608B-MAHDA (TrustCUSTOM) secure elements. This allows the user 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.
Notice:  Previous versions of this board used the ATECC608A version of the devices. The ATECC608B
devices operate identically to the ATECC608A versions of the device when used with the Trust Platform
Design Suite.
Figure 1. Front View Figure 2. Back View
© 2021 Microchip Technology Inc. User Guide DS50002922B-page 1
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............................................................................................................................. 5
2.1. CryptoAuth Trust Platform Connections.......................................................................................5
2.2. Xplained Pro Connections............................................................................................................6
3. Document Revision History.....................................................................................................................8
The Microchip Website...................................................................................................................................9
Product Change Notification Service..............................................................................................................9
Customer Support.......................................................................................................................................... 9
Microchip Devices Code Protection Feature..................................................................................................9
Legal Notice................................................................................................................................................. 10
Trademarks.................................................................................................................................................. 10
Quality Management System....................................................................................................................... 11
Worldwide Sales and Service.......................................................................................................................12
DT100104
© 2021 Microchip Technology Inc. User Guide DS50002922B-page 2
1. Hardware Description
1.1 Schematic and Key Features
One ATECC608B-TNGTLS Trust&GO Device (U1)
Three ATECC608B-TFLXTLS Prototype TrustFLEX Devices (U2, U3, U4)
Four ATECC608B-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. ATECC608B 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 ( ) corresponds to the device identifier U# on the back of thenot the number on the switch
board.
DT100104
Hardware Description
© 2021 Microchip Technology Inc. User Guide DS50002922B-page 3

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