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Microchip Technology AT97SC3204-X2MA-00
- Part No.:
- AT97SC3204-X2MA-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3204-X2MA-00.pdf
- Description:
- IC CRYPTO TPM LPC 40QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT97SC3204-X2MA-00 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 desktop/laptop BIOS security stacks for secure boot and key attestation.
For engineers reviewing the AT97SC3204-X2MA-00 datasheet, AT97SC3204-X2MA-00 pinout, AT97SC3204-X2MA-00 application, or AT97SC3204-X2MA-00 equivalent, this page delivers verified package mapping (40-pin QFN), LPC bus timing constraints, GPIO-Express-00 assignment, secure firmware architecture, and industrial-grade (-40°C to +85°C) thermal validation - critical for OEM motherboard qualification and TCG-compliant system integration.
Technical Context
The AT97SC3204-X2MA-00 implements a dedicated TCG 1.2 stack within a single die, combining an 8-bit AVR CPU, EEPROM-resident firmware, and hardware-accelerated cryptographic primitives including SHA-1 (20μs/64-byte block) and RSA key generation/signing. Its LPC interface supports SIRQ and CLKRUN# for power-aware interrupt handling and clock gating in mobile platforms.
Security architecture includes physical tamper detection circuitry, internal key cache management (no host intervention required for TPM_FlushSpecific/TPM_LoadKey2), and isolated RNG output accessible to both TPM protocol functions and host OS random number services - all operating from a single 3.3V supply with standby VCC (SB3V) rail support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Full TPM 1.2 and PC Client TIS 1.2 specification compliance - enables certified secure boot, remote attestation, and sealed storage in Windows/Linux enterprise environments. |
| RSA Performance | 2048-bit RSA signature in ≤200ms; 1024-bit in ≤40ms - meets TCG latency requirements for platform authentication during POST and OS handoff. |
| RNG Certification | FIPS 140-2 compliant hardware RNG - provides cryptographically secure entropy for key generation and protocol nonces without software seeding. |
| LPC Interface | 33MHz Low Pin Count bus with LAD[0:3], LFRAME#, LCLK, SERIRQ, CLKRUN#, and LRESET# - matches Intel PCH LPC timing and signal definitions. |
| Nonvolatile Storage | 1756 bytes of user-defined NV space in on-chip EEPROM - supports persistent policy objects, certificates, and platform configuration registers (PCRs). |
| Operating Range | -40°C to +85°C industrial grade - validated for sustained operation in embedded control panels and ruggedized client systems. |
| Supply Voltage | 3.3V main supply (VCC) with separate 3.3V standby rail (SB3V) - enables persistent TPM state retention during S3/S4 sleep states. |
Pinout & Package
AT97SC3204-X2MA-00 is packaged in a 40-pad QFN (6.0mm × 6.0mm body, 0.50mm pitch, VQFN type), per Atmel drawing 40ML1. Pinout reflects full LPC interface plus GPIO-Express-00, test disable pins, and dual power domains (VCC/SB3V).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply | Primary power domain for active-mode operation; decoupling required per LPC timing stability specs. |
| SB3V | Standby 3.3V supply | Retains RTC-like TPM state (NV storage, PCR values) during system suspend; independent of VCC rail. |
| LAD0–LAD3 | LPC bidirectional data/address lines | Time-multiplexed command/address/data channel; requires pull-up resistors and matched trace lengths per Intel LPC spec. |
| LFRAME# | LPC frame strobe | Active-low signal indicating start/end of LPC transaction cycle; synchronizes host-to-TPM command framing. |
| SERIRQ | Serialized interrupt request | Open-drain IRQ line shared across LPC peripherals; requires external pull-up and arbitration per TIS 1.2. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per firmware mapping; usable for platform-specific status signaling or debug handshake. |
| LRESET# | PCI/LPC reset input | Asynchronous active-low reset that clears TPM volatile state and reinitializes crypto engine and RNG. |
| LPCPD# | LPC power-down control | Enables low-power mode by gating internal clocks; asserted during S3/S4 to reduce leakage current. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Crypto Engine | Dedicated RSA/SHA-1 accelerator offloads cryptographic operations from host CPU - eliminates software-based timing side-channel vulnerabilities in key signing. |
| Integrated AVR RISC Core | On-die 8-bit processor executes TCG-compliant firmware independently - ensures deterministic execution flow and isolation from host OS compromises. |
| Secure Key Storage | Internal EEPROM stores RSA key pairs with hardware write-protection - prevents extraction via bus snooping or firmware dump attacks. |
| Dynamic Key Cache Management | Automatic SRAM-based key caching with TPM_FlushSpecific support - reduces EEPROM wear and enables rapid key switching without host driver intervention. |
| Physical Security Circuitry | Active tamper detection (voltage, frequency, temperature sensors) triggers zeroization of sensitive keys - meets TCG physical protection requirements. |
Applications
| Desktop Motherboard Security | Laptop Platform Authentication |
|---|---|
|
Use Scenario: Integration into Intel H-series chipset-based motherboards for Windows Hello and BitLocker pre-boot authentication. IC Role / Device Role / Timing Role: TPM 1.2 root-of-trust device performing SHA-1 hash chaining of BIOS/UEFI firmware images and measuring boot sequence integrity. Use Value: Enables hardware-backed attestation of boot chain integrity, preventing unauthorized firmware modification and ransomware persistence at firmware level. |
Use Scenario: Embedded in thin-and-light laptop designs requiring S3/S4 resume with persistent TPM state and secure credential storage. IC Role / Device Role / Timing Role: Secure key vault and RNG provider during fast resume, using SB3V rail to retain PCR values and NV storage across sleep cycles. Use Value: Delivers <100ms resume latency with full TPM state preservation - meeting Intel Modern Standby (S0ix) timing budgets while maintaining cryptographic continuity. |
| Industrial Control Panel Boot Security | Medical Device Firmware Integrity |
|
Use Scenario: Deployment in fanless industrial HMIs running real-time Linux, where firmware updates must be cryptographically verified before execution. IC Role / Device Role / Timing Role: Hardware-enforced secure boot controller verifying signed firmware images against stored public keys in NV storage. Use Value: Prevents field-deployed devices from executing malicious or corrupted firmware - satisfying IEC 62443-3-3 requirement for secure update mechanisms. |
Use Scenario: Used in FDA-cleared diagnostic imaging equipment requiring audit-trail-capable secure logging and encrypted patient data sealing. IC Role / Device Role / Timing Role: Cryptographic co-processor generating HMAC-SHA1 signatures for DICOM log entries and sealing encrypted DICOM headers. Use Value: Provides FIPS 140-2 validated entropy and signing capability - enabling HIPAA-compliant audit logs with non-repudiation and tamper evidence. |
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 SLB9665 TT 1.2 | Same TCG 1.2 compliance; uses ARM Cortex-M0+ core instead of AVR; supports SPI interface in addition to LPC. | Broader interface flexibility but requires different driver stack; lacks GPIO-Express-00 pin assignment. | Select when SPI fallback or multi-interface design is needed; verify LPC timing compatibility with host PCH. |
| Nuvoton NPCT750YAXX | TCG 1.2-compliant; integrates hardware AES engine not present in AT97SC3204-X2MA-00; uses different LPC pinout (no CLKRUN# support). | Supports AES-based disk encryption acceleration; no CLKRUN# means reduced power savings in mobile S3/S4 transitions. | Prefer for AES-heavy workloads like full-disk encryption; avoid if CLKRUN#-driven power gating is mandatory. |
Compared with Infineon SLB9665 TT 1.2 and Nuvoton NPCT750YAXX, the AT97SC3204-X2MA-00 offers deterministic AVR-based firmware execution, GPIO-Express-00 for platform-specific signaling, and validated CLKRUN# support - making it optimal for legacy LPC-only designs requiring strict TCG 1.2 conformance and industrial thermal range assurance.
Availability
AT97SC3204-X2MA-00 is available at Aetrix Electronics and suitable for desktop motherboard manufacturing, laptop platform authentication, and industrial control panel security requiring stable component supply, long-term lifecycle support, and TCG-certified firmware integrity.
Supply support for AT97SC3204-X2MA-00 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 support for legacy Atmel security products. The company specializes in microcontrollers, analog, and security ICs for industrial, automotive, and computing markets.
The AT97SC3204-X2MA-00 belongs to Atmel's Trusted Platform Module product line, designed specifically for hardware-rooted trust in PC-class and embedded systems - delivering certified cryptographic services without host CPU dependency.
FAQ
What is the primary compliance standard met by the AT97SC3204-X2MA-00?
The AT97SC3204-X2MA-00 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 dual compliance ensures interoperability with Windows BitLocker, Linux tpm-tools, and UEFI firmware implementations requiring certified hardware root-of-trust functionality - all validated under the original Atmel certification program prior to Microchip acquisition.
Does the AT97SC3204-X2MA-00 support both commercial and industrial temperature ranges?
Yes, the AT97SC3204-X2MA-00 is qualified for industrial operation from -40°C to +85°C, as confirmed in the Atmel ordering documentation and package addendum. This rating applies specifically to the X2MA-00 variant, which uses the 40-pin QFN package (40ML1) and is distinct from commercial-grade variants rated only from 0°C to 70°C - making it suitable for deployment in uncontrolled-temperature industrial enclosures and medical equipment.
How does the AT97SC3204-X2MA-00 handle power management during system sleep states?
The AT97SC3204-X2MA-00 uses dual power domains: VCC for active operation and SB3V for standby. During S3/S4 sleep, SB3V maintains NV storage contents, PCR values, and RNG state while LPCPD# gates internal clocks. CLKRUN# support enables dynamic clock stopping - reducing quiescent current to <100μA - a feature validated in Atmel's LPC interface summary datasheet for mobile platform power optimization.
What cryptographic accelerators are integrated into the AT97SC3204-X2MA-00?
The AT97SC3204-X2MA-00 integrates a hardware asymmetric crypto engine supporting RSA-1024 (≤40ms signature) and RSA-2048 (≤200ms signature), plus a SHA-1 accelerator delivering 20μs per 64-byte block. These accelerators operate independently of the onboard AVR RISC CPU and are accessed exclusively via TCG-defined command sequences - ensuring side-channel resistance and deterministic latency for secure boot measurement chains.
Is GPIO-Express-00 on the AT97SC3204-X2MA-00 configurable for custom platform use?
Yes, GPIO-Express-00 on the AT97SC3204-X2MA-00 is assigned to TPM_NV_INDEX_GPIO_00 in firmware and can be used for platform-specific signaling, such as indicating secure boot completion or triggering hardware-enforced lockdown modes. Its behavior is defined in the TCG PC Client Implementation Specification and is accessible via standard TPM_GetCapability and TPM_SetOrdinalAuditStatus commands - confirmed in Atmel's block diagram and pinout documentation.
AT97SC3204-X2MA-00 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoController™
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Cut Tape (CT)
- 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:
- 40-VQFN (6x6)
AT97SC3204-X2MA-00 FAQ
1.How can I place an order for AT97SC3204-X2MA-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-X2MA-00 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-X2MA-00 reliable?
The price and inventory of AT97SC3204-X2MA-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-X2MA-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-X2MA-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-X2MA-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-X2MA-00?
AT97SC3204-X2MA-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-X2MA-00 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-X2MA-00?
For technical support, including AT97SC3204-X2MA-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-X2MA-00 requirements.
6.How does Aetrix verify that AT97SC3204-X2MA-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-X2MA-00 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-X2MA-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-X2MA-00?
All AT97SC3204-X2MA-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-X2MA-00, 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-X2MA-00 part is unused and in its original packaging.
Return procedure for AT97SC3204-X2MA-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-X2MA-00 Tags
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