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Complete Security for PCs and Embedded Systems

The FIPS 140-2 Certified Trusted Platform Module (TPM) provides strong hardware-based public key (RSA) security for both personal computers and embedded processors on a single chip. It is a complete turnkey system that integrates our industry-leading AVR® microcontroller architecture, EEPROM technology and security technology. Implementing version 1.2 of the Trusted Computing Group (TCG) specification for TPMs, the chip supports secure boot via platform integrity measurements, intellectual property protection, authentication, and secure communications. The AT97SCx series is offered in three different interfaces: SPI, LPC, and I2C. All revisions are supported in both Commercial and Industrial grades.

Key Features

  • Turnkey solution: The TPM includes integrated, protected nonvolatile storage for cryptographic keys, secrets, and authorization information
  • Full TCG compliance: According to TCG, applications based on the trusted computing infrastructure exhibit superior security governance and risk management
  • Hardware security: The TPM includes a high-quality hardware random number generator, active shielding, and a variety of tamper-detection and response circuits
  • High performance: The TPM’s cryptographic accelerator can compute a 2048-bit RSA signature in 200 ms
  • Energy savings: The TPM supports SIRQ for interrupts and CLKRUN to permit clock stopping for power savings in mobile computers
  • Software support: BIOS and hardware drivers are available for both Windows® and Linux® operating systems; third-party system and application software is also available
  • Two interfaces: There is a 33 MHz LPC interface for PC integration and a 2-wire interface for non-PC and embedded computing systems.
Device Family Summary Benefit Applications Technologies Key Parameters
TCG Version 1.2 Standards-based hardware security 

Network authentication 

Internet compatible 

Turnkey solution 

Full TCG compliance 

High performance 

Software support libraries

Two interfaces – LPC and 2-wire
System, device and network authentication 

Intellectual property protection, system integrity and secure communications.

AVR® microcontrollers

EEPROM technology 

Hardware security technology 

Cryptographic accelerator 

Random Number Generator (RNG) 

Anonymous ID


Trusted Platform Module 

PC security 

Tablet security 


Trusted Computing Group 


Trusted Platform Module Products

View All Parametrics
Product Status 5K Pricing MaxNo Operating FreqNo (MHz) Key Size Interface Type FNomax (MHz) Algorithm Type TempNo Range Min (deg C) Operating Voltage (Vcc) TempNo Range Max (deg C) Packages
AT97SC3204 In Production $0.89 UP TO 2048 LPC RSA / SHA-1 3.3 28/TSSOP, 40/VQFN
AT97SC3205 In Production $1.09 45 UP TO 2048 SPI RSA / SHA-1 / SHA-2 (Sign/Verify Sign) -40 3.3 85 28/TSSOP, 32/VQFN
AT97SC3205T In Production $1.09 UP TO 2048 I2C 0.4 RSA / SHA-1 / SHA-2 (Sign/Verify Sign) -40 3.3 85 28/TSSOP, 32/VQFN


Application Notes

Title Download
AN_8913 - AT97SC3205 TPM Power Supply Decoupling Guide Download
AN_8882 - System Design Manufacturing Recommendations for TPM Devices Download
AN_8580 - TPM Power Supply Decoupling Guide Download


Title Download
Atmel TPM Development and Evaluation Kit Flyer Download
Atmel System Peripheral and Memory Products Brochure Download

Data Sheets

Title Download
Microchip Trusted Platform Module 1.2 Part Number Selection Guide Addendum Download
AT97SC3205T I2C Interface - Summary Datasheet Download
AT97SC3205 SPI Interface - Summary Datasheet Download
AT97SC3204 LPC Interface - Summary Datasheet Download

Product Documents

Title Download
Microchip Trusted Platform Module 1.2 Part Number Selection Guide Addendum Download


Title Download
AT97SC3205P/3205T-SDK2 Schematics - Hardware Reference Schematic for the AT97SC3205P-SDK2 SPI and AT97SC3205T-SDK2 I2C Development Download

User Guides

Title Download
AT97SC3205T-SDK2 and AT97SC3205P-SDK2 Development Kit User Guide Download

White Papers

Title Download
Security for Intelligent, Connected IoT Edge Nodes Download

Tools and Software

Development Kits

AT97SC3205P-SDK2 Development Kit 
Trusted Platform Module (SPI Interface) Development Kit
AT97SC3205T-SDK2 Development Kit
Trusted Platform Module (I²C Serial Interface) Development Kit