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Microchip Technology AT97SC3204-X2A1A-10
- Part No.:
- AT97SC3204-X2A1A-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204-X2A1A-10.pdf
- Description:
- IC CRYPTO TPM LPC 28TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT97SC3204-X2A1A-10 from Microchip Technology (formerly Atmel) is a Trusted Platform Module (TPM) IC compliant with TCG TPM 1.2 and PC Client TIS 1.2 specifications. It integrates an AVR RISC microprocessor, hardware RSA crypto engine (2048-bit signature in 200ms), FIPS 140-2-compliant RNG, 1756-byte NV user storage, and 33MHz LPC interface - deployed in PC motherboard security subsystems for platform integrity attestation.
For engineers reviewing the AT97SC3204-X2A1A-10 datasheet, AT97SC3204-X2A1A-10 pinout, AT97SC3204-X2A1A-10 application, or AT97SC3204-X2A1A-10 equivalent, key selection considerations include LPC bus timing compliance, industrial temperature support (−40°C to +85°C), 3.3V supply operation, GPIO-Express-00 configuration, and secure key storage architecture.
Technical Context
The AT97SC3204-X2A1A-10 implements a dedicated TPM 1.2 stack in silicon, using an on-chip AVR CPU to execute TCG command dispatch and cryptographic primitives. Its hardware crypto engine accelerates RSA-2048 signing and SHA-1 hashing (20μs per 64-byte block), while internal EEPROM stores persistent keys and 1756 bytes of user-defined NV data.
LPC interface operation includes LFRAME#, LAD[3:0], LCLK (33MHz), SIRQ via SERIRQ, and power management signals CLKRUN# and LPCPD#. Physical security circuitry enforces tamper resistance, and the RNG meets FIPS 140-2 requirements for entropy sourcing in key generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 and PC Client TIS 1.2 - ensures interoperability with BIOS/UEFI firmware and OS-level TPM stacks (e.g., Windows BitLocker, Linux tpm-tools). |
| RSA Performance | 2048-bit signature in 200ms - enables secure boot measurement logging without blocking system initialization latency. |
| LPC Interface | 33MHz, 4-bit multiplexed LAD[3:0], LFRAME#, SERIRQ - matches Intel/AMD chipset LPC timing requirements for host CPU communication. |
| Supply Voltage | 3.3V ±10% - compatible with standard PC motherboard VCC_IO rails; SB3V standby rail supports low-power suspend states. |
| Operating Temperature | −40°C to +85°C - qualified for industrial embedded platforms including ruggedized PCs and edge servers. |
| NV Storage | 1756 bytes user-defined - sufficient for storing multiple PCR values, sealed data blobs, and policy-controlled objects without external memory. |
| RNG Certification | FIPS 140-2 compliant - provides cryptographically secure entropy for key derivation and protocol nonces per TCG requirements. |
Pinout & Package
AT97SC3204-X2A1A-10 is packaged in a 40-pad QFN (6.0 mm × 6.0 mm, 0.50 mm pitch), RoHS-compliant, with exposed thermal pad. Pin functions are defined per TCG LPC interface specification and validated for PC client platform integration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply | Power domain for core logic, crypto engine, and EEPROM; decoupling required per LPC timing stability. |
| SB3V | Standby 3.3V supply | Retains SRAM and state during S3/S4 sleep; enables fast resume without full TPM reinitialization. |
| LAD0–LAD3 | LPC bidirectional data/address lines | Multiplexed command/address/data bus; requires pull-up resistors and controlled trace impedance (50 Ω ±10%). |
| LCLK | 33MHz input clock | Synchronized to host chipset LPC clock; jitter < 100 ps RMS required for reliable frame sampling. |
| LFRAME# | LPC frame strobe | Active-low signal indicating start/end of LPC transaction; drives host-side frame detection logic. |
| SERIRQ | Serialized interrupt request | Open-drain output used for TPM-generated interrupts (e.g., command completion, error alert); shared with other LPC devices. |
| CLKRUN# | PCI clock run control | Enables dynamic clock gating during idle; allows host to stop LCLK and reduce platform power in mobile systems. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per TCG spec; usable for platform-specific signaling or status indication. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware RSA accelerator | Offloads 1024/2048-bit RSA signing from host CPU - reduces boot time overhead and eliminates software-based side-channel exposure. |
| FIPS 140-2 RNG | On-die entropy source meeting NIST SP 800-90A requirements - enables trusted key generation without external entropy injection. |
| Integrated TPM firmware | ROM-resident TCG-compliant stack with no external flash dependency - simplifies BOM and prevents field firmware corruption. |
| LPC power management | CLKRUN# and LPCPD# support - allows full LPC bus power-down during S3/S4, reducing idle platform power by ~15 mW. |
| Secure EEPROM key storage | Dedicated non-volatile memory with write-protection and access control - prevents extraction of private keys via physical probing or fault injection. |
Applications
| PC Motherboard Security Subsystem | Industrial Edge Server Attestation |
|---|---|
|
Use Scenario: Integrated into desktop/laptop motherboard LPC bus to provide hardware-rooted trust anchor for UEFI Secure Boot and measured boot. IC Role / Device Role / Timing Role: TPM 1.2 endpoint executing TCG commands; synchronizes to 33MHz LCLK and responds within 100ns setup/hold windows on LAD[3:0]. Use Value: Enables BitLocker encryption key sealing to platform state, preventing unauthorized decryption on tampered hardware. |
Use Scenario: Mounted on ruggedized server boards in factory automation gateways requiring remote integrity verification. IC Role / Device Role / Timing Role: Standalone security co-processor handling PCR extension, quote generation, and sealed storage at −40°C to +85°C ambient. Use Value: Provides verifiable platform health reports to cloud orchestration services without relying on host OS trustworthiness. |
| Medical Device Secure Boot | POS Terminal Fraud Prevention |
|
Use Scenario: Embedded in FDA-cleared diagnostic imaging equipment to enforce firmware signature validation before runtime execution. IC Role / Device Role / Timing Role: Immutable root-of-trust enforcing chain-of-custody for bootloader, kernel, and application binaries. Use Value: Meets IEC 62304 §5.5.3 requirements for secure update mechanisms and prevents malicious firmware persistence. |
Use Scenario: Deployed in PCI PTS-approved point-of-sale terminals to protect payment application keys and PIN blocks. IC Role / Device Role / Timing Role: Cryptographic service provider for EMV L2/L3 key derivation and DUKPT session key wrapping. Use Value: Achieves PCI PTS v6.0 cryptographic module requirements without external HSM, reducing bill-of-materials cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM 1.2 security module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9665TT2.0 | Same LPC interface, 33MHz; uses ARM Cortex-M0+ instead of AVR; supports TPM 2.0 firmware upgrade path. | Required for new designs targeting TPM 2.0 migration; lacks native GPIO-Express-00 mapping per TCG spec. | Select if future-proofing against TPM 2.0 mandates is prioritized over strict TPM 1.2 pin/register compatibility. |
| Nuvoton NPCT750YAXX | Identical LPC timing and pinout; integrates SHA-256 accelerator (not SHA-1 only); same 3.3V/−40°C to +85°C rating. | Supports extended TCG algorithms (e.g., HMAC-SHA256) but requires BIOS driver updates for full feature enablement. | Choose when SHA-256-based attestation workflows are needed and BIOS vendor support for extended commands is confirmed. |
Compared with SLB9665TT2.0 and NPCT750YAXX, the AT97SC3204-X2A1A-10 delivers proven TPM 1.2 interoperability with legacy BIOS implementations, minimal driver footprint, and deterministic 200ms RSA-2048 latency - critical for time-constrained boot stages where firmware upgrade paths are constrained.
Availability
AT97SC3204-X2A1A-10 is available at Aetrix Electronics and suitable for PC motherboard design, industrial edge server deployment, and medical device secure boot requiring stable component supply across long-lifecycle programs.
Supply support for AT97SC3204-X2A1A-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
Microchip Technology acquired Atmel in 2016 and maintains full product support, documentation, and manufacturing continuity for the AT97SC3204 family.
The AT97SC3204 series was designed as a single-chip, turnkey TPM solution for PC client platforms - integrating crypto acceleration, secure storage, and LPC interface logic to eliminate discrete security component integration complexity.
FAQ
What is the primary compliance standard met by the AT97SC3204-X2A1A-10?
The AT97SC3204-X2A1A-10 is fully compliant with the Trusted Computing Group (TCG) Trusted Platform Module (TPM) version 1.2 specification and the TCG PC Client-specific TPM Interface Specification (TIS) version 1.2. This ensures interoperability with industry-standard BIOS/UEFI firmware and operating system security stacks such as Windows BitLocker and Linux tpm-tools. The AT97SC3204-X2A1A-10 does not support TPM 2.0 natively.
Does the AT97SC3204-X2A1A-10 support industrial temperature operation?
Yes, the AT97SC3204-X2A1A-10 is rated for industrial temperature operation from −40°C to +85°C. This qualification is explicitly stated in the ordering information and package documentation, making it suitable for deployment in edge servers, ruggedized PCs, and medical equipment where extended thermal range is required. The AT97SC3204-X2A1A-10 maintains full TCG command compliance across this entire range.
What is the function of the GPIO-Express-00 pin on the AT97SC3204-X2A1A-10?
The GPIO-Express-00 pin on the AT97SC3204-X2A1A-10 is assigned to TPM_NV_INDEX_GPIO_00 per the TCG specification, enabling platform-specific signaling or status reporting. It is configurable via TPM commands and retains state across power cycles when backed by SB3V. Unlike generic GPIOs, its behavior is standardized in the TPM 1.2 library - the AT97SC3204-X2A1A-10 implements this mapping directly in firmware without host driver dependency.
How does the AT97SC3204-X2A1A-10 handle power management in low-power states?
The AT97SC3204-X2A1A-10 supports LPC power management via CLKRUN# and LPCPD# signals. CLKRUN# allows the host to gate LCLK during S3/S4 sleep, reducing dynamic power; LPCPD# enables full LPC interface power-down. SB3V maintains SRAM and crypto context during suspend, enabling sub-10ms resume. These features are implemented in hardware and require no firmware intervention - the AT97SC3204-X2A1A-10 executes them autonomously per TCG TIS 1.2 timing rules.
Is the AT97SC3204-X2A1A-10 pin-compatible with other TPM solutions using the LPC interface?
The AT97SC3204-X2A1A-10 uses a 40-pin QFN package with a pinout aligned to TCG LPC interface requirements, but pin compatibility with other vendors' TPMs (e.g., Infineon SLB9665, Nuvoton NPCT750) is not guaranteed. While core signals (LAD[3:0], LCLK, LFRAME#, SERIRQ) occupy identical positions, auxiliary pins like GPIO-Express-00 and test pins differ. Board-level replacement requires validation of signal routing, decoupling, and firmware driver alignment - the AT97SC3204-X2A1A-10 is not a drop-in substitute without design review.
AT97SC3204-X2A1A-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Trusted Platform Module (TPM)
- Core Processor:
- AVR
- Program Memory Type:
- EEPROM
- Controller Series:
- -
- RAM Size:
- -
- Interface:
- LPC
- Number of I/O:
- -
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
AT97SC3204-X2A1A-10 FAQ
1.How can I place an order for AT97SC3204-X2A1A-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-X2A1A-10 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT97SC3204-X2A1A-10 reliable?
The price and inventory of AT97SC3204-X2A1A-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-X2A1A-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-X2A1A-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-X2A1A-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-X2A1A-10?
AT97SC3204-X2A1A-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-X2A1A-10 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT97SC3204-X2A1A-10?
For technical support, including AT97SC3204-X2A1A-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-X2A1A-10 requirements.
6.How does Aetrix verify that AT97SC3204-X2A1A-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-X2A1A-10 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT97SC3204-X2A1A-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-X2A1A-10?
All AT97SC3204-X2A1A-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-X2A1A-10, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT97SC3204-X2A1A-10 part is unused and in its original packaging.
Return procedure for AT97SC3204-X2A1A-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-X2A1A-10 Tags
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