Microchip Technology AT97SC3204-X1A190-1

Overview

AT97SC3204-X1A190-1 from Atmel is a TCG TPM 1.2-compliant security IC implementing hardware-accelerated 2048-bit RSA signing (200ms), SHA-1 hashing (20µs/64B block), and FIPS 140-2-compliant true RNG. It integrates an AVR RISC CPU, internal EEPROM for key storage, and 1280-byte user NV space. Designed for PC platform root-of-trust in LPC-based motherboards.

For engineers reviewing the AT97SC3204-X1A190-1 datasheet, AT97SC3204-X1A190-1 pinout, AT97SC3204-X1A190-1 application, or AT97SC3204-X1A190-1 equivalent, this page delivers verified package mapping (28-pin Thin TSSOP), LPC interface timing, secure firmware architecture, and OEM integration support including BIOS drivers and manufacturing initialization tools.

Technical Context

The AT97SC3204-X1A190-1 implements the full TCG PC Client Specific TPM Interface Specification v1.2 over a 33MHz LPC bus with SIRQ and CLKRUN# support for power-managed mobile platforms. Its cryptographic engine executes asymmetric operations independently of the host CPU using dedicated hardware accelerators for RSA and SHA-1.

Internal memory management dynamically caches multiple RSA keys without host intervention beyond standard TCG commands (TPM_FlushSpecific, TPM_LoadKey2). Physical security circuitry, tamper-resistant layout, and secure boot ROM ensure protection against side-channel and fault injection attacks per TPM 1.2 requirements.

Key Specifications

Pinout & Package

AT97SC3204-X1A190-1 is packaged in a 28-lead Thin TSSOP (4.4 mm × 9.7 mm body, 0.65 mm pitch) per JEDEC MO-153 Variation AE. Pinout validated per Atmel document 5294BS–TPM–9/10.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Infineon SLB9665TT2.0 and Nuvoton NPCT750KBX1G, the AT97SC3204-X1A190-1 uniquely balances TPM 1.2 compliance, 28-pin TSSOP packaging, CLKRUN#-enabled power optimization, and 200ms RSA performance-making it optimal for cost-sensitive, space-constrained industrial and legacy PC platforms requiring certified root-of-trust without 2.0 migration.

Availability

AT97SC3204-X1A190-1 is available at Aetrix Electronics and suitable for desktop motherboard design, industrial control system integration, and thin client security implementation requiring stable component supply across commercial and industrial temperature grades.

Supply support for AT97SC3204-X1A190-1 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) is a semiconductor manufacturer specializing in microcontrollers, security ICs, and touch solutions for embedded systems.

The AT97SC3204 product line delivers certified TPM 1.2 modules targeting PC platform root-of-trust, designed specifically for seamless integration into LPC-based motherboards and industrial control units requiring hardware-enforced security primitives.

FAQ

What is the primary security standard compliance of the AT97SC3204-X1A190-1?

The AT97SC3204-X1A190-1 is fully compliant with the Trusted Computing Group (TCG) TPM Specification Version 1.2 and the TCG PC Client Specific TPM Interface Specification Version 1.2. It meets all mandatory requirements for cryptographic operations, platform configuration register (PCR) management, and secure key storage defined in those standards. This compliance enables its use in certified Windows BitLocker deployments and other TCG-aligned security frameworks without modification.

Does the AT97SC3204-X1A190-1 support both commercial and industrial temperature ranges?

Yes, the AT97SC3204-X1A190-1 is qualified for both commercial (0°C to +70°C) and industrial (−40°C to +85°C) operating temperature ranges. The industrial grade qualification is explicitly documented in Atmel's revision history (5294BS, October 2010) and supported by thermal validation across the full range. This dual qualification makes the AT97SC3204-X1A190-1 suitable for deployment in embedded systems exposed to wide ambient conditions, such as factory automation controllers and outdoor kiosks.

What package type is used for the AT97SC3204-X1A190-1?

The AT97SC3204-X1A190-1 uses a 28-lead Thin TSSOP package (4.4 mm × 9.7 mm body, 0.65 mm pitch), designated as variant 28A2 per Atmel's ordering documentation. This package is lead-free and RoHS-compliant, and its pinout matches the LPC interface requirements defined in the AT97SC3204 datasheet summary (5294BS–TPM–9/10). It is distinct from the 28A3 (wider TSSOP) and 40ML1 (QFN) variants.

How does the AT97SC3204-X1A190-1 handle cryptographic key storage?

The AT97SC3204-X1A190-1 stores RSA keys in internal EEPROM with hardware-enforced write protection and access control. Keys are generated on-chip using the FIPS 140-2–compliant true RNG, and the device implements dynamic internal memory management to cache multiple keys without host intervention beyond standard TCG commands like TPM_FlushSpecific and TPM_LoadKey2. This architecture prevents external extraction and eliminates the need for host-side key caching logic.

What LPC interface signals does the AT97SC3204-X1A190-1 require for operation?

The AT97SC3204-X1A190-1 requires seven essential LPC interface signals: LAD0–LAD3 (bidirectional multiplexed address/data), LCLK (33MHz input clock), LFRAME# (frame strobe), SERIRQ (serialized interrupt), and CLKRUN# (clock run control). It also uses LRESET# for asynchronous reset and SB3V for standby power. These signals align precisely with Intel's LPC specification and enable full TCG-compliant communication with chipset root complexes in desktop, mobile, and embedded platforms.