AT97SC3205T-H3M44-10

Application Specific Microcontrollers Overview

The AT97SC3205T is a fully integrated Trusted Platform Module (TPM) compliant with the TCG TPM Version 1.2 specification. It features an Atmel AVR RISC microprocessor, hardware asymmetric crypto engine, and internal EEPROM for RSA keys. The device supports I2C communication at 400kHz Fast Mode or 100kHz Standard Mode. It includes FIPS-140-2 certified components such as RNG, HMAC, AES, SHA, and RSA engines. Operating on a 3.3V supply, it provides 2066 bytes of NV storage for user-defined data. Available in 28-lead Thin TSSOP or 32-pad QFN packages, it operates within commercial (0°C to 70°C) and industrial (-40°C to 85°C) temperature ranges.

Application Specific Microcontrollers Feature Summary

• Compliant with TCG TPM Version 1.2 Specification
• FIPS-140-2 Certified RNG, HMAC, AES, SHA, and RSA Engines
• Hardware Asymmetric Crypto Engine with Internal EEPROM for RSA Keys
• I2C Interface Supporting 400kHz Fast Mode and 100kHz Standard Mode

Application Specific Microcontrollers Applications

• Embedded systems requiring secure hardware and firmware design
• Trusted Platform Modules for identity and authentication
• Systems needing FIPS-140-2 certified cryptographic operations

Application Specific Microcontrollers Procurement Notes

Verify package type (28-pin TSSOP or 32-pin QFN) and temperature range (Commercial or Industrial) against project requirements. Confirm that the ordering suffix corresponds to the specific package and operational range desired. Ensure decoupling capacitors are placed correctly per datasheet recommendations for reliable operation.

Application Specific Microcontrollers Selection Notes

Select based on required operating temperature range and physical package constraints. The device supports both Commercial (0°C to 70°C) and Industrial (-40°C to 85°C) ranges. Choose between 28-lead Thin TSSOP and 32-pad QFN based on PCB layout space and pin availability. Ensure I2C pull-up values are appropriate for 400kHz operation if high-speed communication is needed.

Application Specific Microcontrollers Part Context

This component is part of the AT97SC3205T series of Trusted Platform Modules manufactured by Microchip Technology (formerly Atmel). It serves as a single-chip turnkey solution for implementing TPM functionality in embedded systems, providing hardware-based security features including key storage and cryptographic acceleration.

Application Specific Microcontrollers Replacement Considerations

Consult official Microchip/Atmel documentation for verified substitute part numbers. Ensure any replacement maintains TCG TPM 1.2 compliance, FIPS-140-2 certification status, and compatible I2C interface specifications. Verify package dimensions and pinout compatibility before substitution.

Application Specific Microcontrollers FAQ

What is the minimum reset pulse width required for the LRESET# pin?

The required minimum reset pulse width is 2μs.

How should unused GPIO pins be handled?

Unused GPIO pins should be tied high or low. Specifically, GPIO-Express-00 has an internal pull-up and should be left floating if unused, while PP/GPIO has an internal pull-down and should also be left floating if unused.

What is the recommended decoupling capacitor value for VCC?

A decoupling bypass capacitor within the range of 2200pF to 4700pF should be placed close to each VCC pin, with a 0.1μF capacitor at the node where VCC traces join.