AT97SC3204-X1A190

Overview

The AT97SC3204-X1A190 is a security module implementing the Trusted Computing Group (TCG) Trusted Platform Module (TPM) Version 1.2 specification. It integrates an AVR RISC microprocessor, hardware asymmetric crypto engine, and EEPROM storage for RSA keys. The device supports 2048-bit RSA signing in 200ms and communicates via a 33MHz LPC bus. It includes a FIPS 140-2 compliant True Random Number Generator (RNG) and provides 1280 bytes of non-volatile user-defined data storage. Operating at 3.3V, it is available in commercial and industrial temperature ranges.

Feature Summary

• Full TCG TPM Version 1.2 compatibility with PC Client Specific Interface Specification compliance
• Hardware acceleration for 2048-bit RSA signatures (200ms) and SHA-1 hashing (20µs per 64-byte block)
• Integrated AVR 8-bit RISC CPU with internal EEPROM for key management and 1280-byte NV storage
• FIPS 140-2 compliant True Random Number Generator (RNG) for secure key generation

Applications

• Personal computer security platforms requiring TPM integration
• Embedded systems needing hardware-based authentication and encryption
• Mobile computers utilizing LPC CLKRUN for power savings

Procurement Notes

Verify package availability as the component is offered in 28-lead Thin TSSOP, 28-lead TSSOP, or 40-lead QFN configurations. Confirm operating temperature range requirements against Commercial (0 to 70°C) and Industrial (-40 to +85°C) options. Ensure system design accommodates the 3.3V supply voltage and LPC interface signals including LRESET#, SERIRQ, and LPCPD#.

Selection Notes

Select based on required package type: 28A2 (Thin TSSOP), 28A3 (TSSOP), or 40ML1 (QFN). Choose the appropriate temperature grade depending on environmental constraints. Verify that the host system supports the 33MHz LPC bus protocol and provides necessary interrupt handling for the SERIRQ pin. Consider BIOS driver availability for target operating systems during integration planning.

Part Context

Manufactured by Microchip Technology (formerly Atmel), this component serves as a turnkey security solution for OEM and ODM manufacturers. It replaces discrete cryptographic components by integrating firmware, crypto engines, and memory into a single chip. The device simplifies PC security implementation by providing pre-certified TPM functionality compliant with industry standards.

Replacement Considerations

Check for updated TPM versions (e.g., TPM 2.0) if future-proofing is required. Verify pinout compatibility when substituting within the same package family. Confirm that legacy BIOS support remains available for older operating systems if migrating from previous generations.