Microchip Technology AT97SC3204-DX2A12-10

Overview

AT97SC3204-DX2A12-10 from Atmel is a TCG TPM 1.2-compliant security IC implementing hardware-accelerated 2048-bit RSA signing (200ms), SHA-1 acceleration (20µs/64-byte block), and FIPS 140-2-compliant true RNG. It integrates an AVR RISC CPU, internal EEPROM for RSA keys, and 1280 bytes of user NV storage. Designed for PC platform root-of-trust, it interfaces via 33MHz LPC bus with SIRQ and CLKRUN support for mobile power management.

For engineers reviewing the AT97SC3204-DX2A12-10 datasheet, AT97SC3204-DX2A12-10 pinout, AT97SC3204-DX2A12-10 application, or AT97SC3204-DX2A12-10 equivalent, key selection criteria include LPC interface timing compliance, TCG 1.2 firmware certification status, industrial temperature range (-40°C to +85°C), 28-pin Thin TSSOP mechanical fit, and secure key lifecycle management without host intervention.

Technical Context

The AT97SC3204-DX2A12-10 implements the full TCG TPM 1.2 stack in silicon, including dedicated crypto engine for asymmetric (RSA) and symmetric (SHA-1) operations, coupled with physical security circuitry and tamper-resistant layout. Its AVR-based controller executes certified firmware directly from on-chip ROM and EEPROM.

LPC interface compliance includes LAD[3:0], LFRAME#, LCLK (33MHz), LRESET#, SERIRQ, and CLKRUN# signals - enabling direct integration into x86 motherboard designs without bridge logic. The device supports dynamic key cache management via TPM_FlushSpecific and TPM_LoadKey2 commands, eliminating runtime host memory management overhead.

Key Specifications

Pinout & Package

AT97SC3204-DX2A12-10 is packaged in a 28-lead Thin TSSOP (4.4 mm × 9.7 mm body, 0.65 mm pitch), RoHS-compliant and lead-free. Pin functions are defined per JEDEC MO-153 Variation AE.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TPM security module applications.

Compared with AT97SC3204-DX2A12-10, the SLB9665TT2.0 enables future-proofing for TPM 2.0 mandates but requires firmware and driver revalidation, while the NPCT750YAXX offers drop-in replacement capability in existing 28-pin TSSOP layouts with lower core voltage flexibility - both lack the dedicated SB3V rail and AVR-specific firmware toolchain of the Atmel part.

Availability

AT97SC3204-DX2A12-10 is available at Aetrix Electronics and suitable for desktop motherboard design, industrial PLC security upgrades, and medical imaging device certification requiring stable component supply and long-term lifecycle support.

Supply support for AT97SC3204-DX2A12-10 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Atmel Corporation, now part of Microchip Technology, specialized in secure microcontrollers and trusted computing solutions before its 2016 acquisition.

The AT97SC3204 product line delivers certified, single-chip TPM 1.2 modules for PC and embedded platforms requiring hardware-rooted security, with focus on BIOS-integrated authentication, sealed storage, and remote attestation.

FAQ

What is the primary function of the AT97SC3204-DX2A12-10 in a computing platform?

The AT97SC3204-DX2A12-10 serves as a hardware-based Trusted Platform Module (TPM) implementing TCG TPM 1.2 specifications. It provides cryptographic services including RSA signing, SHA-1 hashing, secure key generation via FIPS 140-2 RNG, and protected nonvolatile storage - establishing a hardware root-of-trust for secure boot, remote attestation, and sealed storage in PCs and embedded systems. Its LPC interface allows direct integration into x86 motherboard designs without additional logic.

Does the AT97SC3204-DX2A12-10 support both commercial and industrial temperature ranges?

Yes, the AT97SC3204-DX2A12-10 is qualified for industrial operation from -40°C to +85°C, as confirmed in Atmel's ordering information and revision history. This makes it suitable for use in harsh-environment applications such as factory automation controllers, network infrastructure equipment, and medical devices where extended thermal stability is required - unlike commercial-grade variants limited to 0°C to 70°C.

What package type is used for the AT97SC3204-DX2A12-10, and is it RoHS-compliant?

The AT97SC3204-DX2A12-10 uses a 28-lead Thin TSSOP package (4.4 mm × 9.7 mm body, 0.65 mm pitch), designated as variant "28A2" in Atmel documentation. It is lead-free and RoHS-compliant, meeting environmental directives for electronics manufacturing. Package drawings confirm compliance with JEDEC MO-153 Variation AE, and the ordering table explicitly lists "Lead-free, RoHS" for this variant.

How does the AT97SC3204-DX2A12-10 handle cryptographic key storage and management?

The AT97SC3204-DX2A12-10 stores RSA keys in internal EEPROM with hardware protection against read-out or tampering. It implements dynamic key cache management using TCG-defined commands (TPM_FlushSpecific, TPM_LoadKey2), allowing multiple keys to reside securely without host-side memory management. Keys never leave the chip in plaintext, and the hardware crypto engine performs all signing/decryption operations internally - ensuring private key confidentiality throughout the device lifecycle.

Is the AT97SC3204-DX2A12-10 compatible with standard LPC bus timing and signaling?

Yes, the AT97SC3204-DX2A12-10 fully complies with the TCG PC Client Specific TPM Interface Specification v1.2 for LPC communication. It supports LAD[3:0], LFRAME#, LCLK (33MHz), SERIRQ, CLKRUN#, and LRESET# with documented setup/hold times and electrical characteristics matching LPC 1.1 requirements. Its timing parameters are validated for integration with Intel and AMD chipset LPC controllers in desktop and server motherboards.