AT97SC3205-U3A15-20

Application Specific Microcontrollers Overview

The AT97SC3205-U3A15-20 is a Trusted Platform Module (TPM) compliant with TCG TPM Version 1.2 and TIS Version 1.3 specifications. It integrates an Atmel AVR RISC microprocessor, hardware asymmetric crypto engine, and internal EEPROM for RSA key storage. The device supports the Serial Peripheral Interface (SPI) protocol at up to 45MHz and includes a FIPS-140-2 certified Random Number Generator (RNG). It operates on a 3.3V supply voltage and provides 2066 bytes of non-volatile user-defined data storage.

Application Specific Microcontrollers Feature Summary

• Compliant with TCG TPM 1.2 and TIS 1.3 specifications
• Integrated Atmel AVR RISC Microprocessor and Hardware Crypto Engine
• FIPS-140-2 Certified RNG, HMAC, AES, SHA, and RSA Engines
• Internal EEPROM Storage for RSA Keys and 2066 bytes NV User Data

Application Specific Microcontrollers Applications

• Personal computers and embedded systems security modules
• Hardware physical presence indication via PP/GPIO pin
• Secure boot and platform authentication in OEM/ODM designs

Application Specific Microcontrollers Procurement Notes

Verify package type availability as the component is offered in both 28-lead Thin TSSOP and 32-pad QFN configurations. Confirm operating temperature range requirements against commercial (0°C to 70°C) or industrial (-40°C to +85°C) ratings before procurement. Ensure decoupling capacitors are placed within specified distances to VCC pins for reliable operation.

Application Specific Microcontrollers Selection Notes

Select the appropriate package based on board space constraints: 28X1 for 28-pin thin TSSOP or 32M3 for 32-pad QFN. Consider the SPI clock frequency limits, noting that typical PC operating ranges are 24MHz to 33MHz despite a 45MHz capability. Ensure system reset logic ties to the SPI_RST# pin to meet TCG initialization requirements.

Application Specific Microcontrollers Part Context

The AT97SC3205 series serves as a turnkey security solution for OEMs and ODMs, providing integrated firmware and necessary device drivers for OS integration. It replaces discrete security components by consolidating TPM functions into a single chip with secure hardware design and manufacturing support software for board assembly verification.

Application Specific Microcontrollers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing BIOS drivers and operating system device drivers when considering alternative TPM solutions.