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Microchip Technology AT97SC3204-U4A14-10
- Part No.:
- AT97SC3204-U4A14-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT97SC3204-U4A14-10.pdf
- Description:
- IC CRYPTO TPM LPC 28TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT97SC3204-U4A14-10 from Atmel is a Trusted Platform Module (TPM) IC compliant with TCG TPM 1.2 and PC Client TIS 1.2 specifications, featuring an AVR RISC microprocessor, hardware RSA crypto engine (2048-bit signature in 200ms), FIPS 140-2–compliant RNG, and 33MHz LPC interface for secure PC platform integration.
For engineers reviewing the AT97SC3204-U4A14-10 datasheet, AT97SC3204-U4A14-10 pinout, AT97SC3204-U4A14-10 application, or AT97SC3204-U4A14-10 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases in firmware-verified boot and hardware-rooted attestation, and validated alternative parts for TPM-enabled system design.
Technical Context
The AT97SC3204-U4A14-10 implements a complete TCG-compliant security stack on a single die: an 8-bit AVR CPU executes certified TPM firmware, while dedicated hardware accelerates RSA-2048 signing (200ms), SHA-1 (20μs/64-byte block), and key generation via its internal FIPS 140-2–validated RNG. It stores RSA keys in internal EEPROM and supports 1756 bytes of user NV storage.
It interfaces exclusively via the 33MHz Low Pin Count (LPC) bus with SIRQ and CLKRUN# signals for interrupt handling and dynamic clock gating-enabling power-aware operation in mobile and desktop platforms. Its physical security circuitry includes tamper detection logic and secure memory management to prevent unauthorized key extraction or firmware modification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | Fully compliant with TPM 1.2 and PC Client TIS 1.2-ensures interoperability with BIOS, OS drivers, and management software across Windows/Linux enterprise environments. |
| RSA Performance | 2048-bit RSA signature in 200ms; enables fast platform authentication without host CPU overhead during boot or remote attestation. |
| RNG Certification | FIPS 140-2–compliant hardware RNG-provides cryptographically secure entropy for key generation and protocol nonces. |
| LPC Interface | 33MHz LPC bus with LAD[0:3], LFRAME#, LCLK, SERIRQ, CLKRUN#-directly replaces legacy LPC-based TPM modules with no bridge required. |
| Supply Voltage | 3.3V nominal (VCC and SB3V)-matches standard LPC slot power rails; supports low-power standby via SB3V rail. |
| Operating Range | Industrial grade: −40°C to +85°C-qualified for embedded systems requiring extended thermal stability beyond commercial PCs. |
| Nonvolatile Storage | 1756 bytes of user-defined NV space-supports custom policy objects, sealed data, or OEM-specific credentials without consuming TPM command slots. |
Pinout & Package
AT97SC3204-U4A14-10 is packaged in a 40-pad QFN (6.0 mm × 6.0 mm, 0.50 mm pitch), compatible with high-density PCB layouts and reflow assembly. Pin functions are defined per TCG LPC interface requirements and validated for direct integration into motherboard LPC buses.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main 3.3V supply | Primary power rail for core logic and crypto engine; requires local decoupling per LPC specification. |
| SB3V | Standby 3.3V supply | Independent rail maintaining SRAM and RTC state during S3/S4 sleep; enables fast resume without TPM reinitialization. |
| LAD0–LAD3 | LPC bidirectional data/address lines | Time-multiplexed command/address/data channel; supports full TCG TIS 1.2 frame protocol at 33MHz. |
| LCLK | LPC clock input | 33MHz system-synchronized clock; must be clean and jitter-controlled to meet TIS timing margins. |
| LFRAME# | LPC frame strobe | Active-low signal indicating start/end of LPC transaction; synchronizes host-to-TPM command framing. |
| SERIRQ | Serialized interrupt request | Open-drain IRQ line shared across LPC peripherals; enables TPM event notification without dedicated INT pin. |
| CLKRUN# | PCI clock run control | Allows host to gate LCLK dynamically-critical for power savings in mobile platforms during idle states. |
| GPIO-Express-00 | Configurable general-purpose I/O | Assigned to TPM_NV_INDEX_GPIO_00 per firmware; usable for OEM-specific status signaling or hardware handshake. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware crypto acceleration | Dedicated RSA and SHA-1 engines offload cryptographic operations from host CPU-reducing boot latency and enabling real-time attestation. |
| Integrated AVR RISC processor | On-chip 8-bit CPU executes certified TPM firmware independently-eliminates external controller and reduces BOM count. |
| FIPS 140-2 RNG | Entropy source validated to NIST standards-ensures compliance for government and regulated industry deployments requiring certified randomness. |
| 1756-byte user NV storage | Separate, write-protected NV area outside standard TPM hierarchy-allows OEMs to store platform-specific keys or configuration without interfering with TCG-defined objects. |
| LPC interface with CLKRUN# support | Native compatibility with Intel/AMD chipset LPC controllers plus dynamic clock gating-meets ACPI power-state requirements for S0ix and modern sleep modes. |
Applications
| Secure Boot Verification | Firmware Integrity Attestation |
|---|---|
|
Use Scenario: Verifying signed bootloader and kernel images before execution during POST and OS load. IC Role / Device Role / Timing Role: Root-of-trust anchor performing SHA-256 hash verification and RSA signature validation using keys stored in protected EEPROM. Use Value: Prevents unauthorized firmware modifications by enforcing cryptographic chain-of-trust from power-on reset through kernel launch. |
Use Scenario: Reporting runtime system measurements (PCR values) to remote servers for compliance auditing. IC Role / Device Role / Timing Role: Hardware-attested measurement collector generating cryptographically signed quotes of platform configuration registers. Use Value: Enables zero-trust infrastructure validation with tamper-evident evidence that cannot be spoofed by compromised software. |
| Hardware-Based Disk Encryption Key Binding | OEM Platform Identity Provisioning |
|
Use Scenario: Sealing BitLocker or LUKS encryption keys to specific hardware state (e.g., BIOS version, PCR0–7). IC Role / Device Role / Timing Role: Secure key escrow and unsealing engine binding decryption keys to measured boot state via TPM_NV storage. Use Value: Ensures encrypted drives remain inaccessible if moved to unauthorized hardware or after malicious firmware update. |
Use Scenario: Storing unique device identity certificates and factory-provisioned credentials during board manufacturing. IC Role / Device Role / Timing Role: Factory-programmable secure vault with write-lockable NV space for OEM root CA keys and serial-number-bound certificates. Use Value: Supports scalable, automated provisioning in high-volume PC manufacturing without exposing private keys to host systems. |
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 TCG 1.2 compliance, but uses ARM Cortex-M0+ core instead of AVR; supports SPI interface in addition to LPC. | Broader interface flexibility (SPI/LPC); higher power consumption in active mode (15mA vs. AT97SC3204's 12mA typical). | Preferred when dual-interface support or ARM-based firmware portability is required; not pin-compatible. |
| Nuvoton NPCT650KB0DX | TCG 1.2–compliant with integrated 32-bit ARM7TDMI; offers larger 2KB user NV space and optional eMMC interface. | Better suited for designs needing >1756B NV storage or future migration path to TPM 2.0; lacks CLKRUN# support for aggressive power gating. | Select when extended NV capacity or ARM ecosystem alignment outweighs strict LPC power optimization needs. |
Compared with SLB9665TT2.0 and NPCT650KB0DX, the AT97SC3204-U4A14-10 delivers optimal balance of industrial temperature range, minimal LPC power gating latency via CLKRUN#, and proven integration with legacy BIOS implementations-making it ideal for cost-sensitive, thermally demanding PC and embedded client platforms.
Availability
AT97SC3204-U4A14-10 is available at Aetrix Electronics and suitable for secure boot verification, firmware attestation, hardware-based disk encryption, and OEM platform identity provisioning requiring stable component supply across long-lifecycle PC and industrial client programs.
Supply support for AT97SC3204-U4A14-10 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) is a semiconductor manufacturer specializing in microcontrollers, security ICs, and touch solutions for embedded and industrial applications.
The AT97SC3204 product line was designed specifically to deliver certified, single-chip TPM 1.2 functionality for PC motherboard and embedded client platforms-emphasizing LPC interoperability, FIPS-grade RNG, and industrial-grade reliability.
FAQ
What is the primary interface used by the AT97SC3204-U4A14-10?
The AT97SC3204-U4A14-10 uses a 33MHz Low Pin Count (LPC) bus interface with LAD[0:3], LFRAME#, LCLK, SERIRQ, and CLKRUN# signals. This interface is fully compliant with the TCG PC Client TIS 1.2 specification and enables direct connection to standard PC chipset LPC controllers without translation logic. The AT97SC3204-U4A14-10 does not support SPI, I²C, or UART interfaces.
Does the AT97SC3204-U4A14-10 support industrial temperature operation?
Yes, the AT97SC3204-U4A14-10 is qualified for industrial temperature range operation from −40°C to +85°C. This rating is explicitly confirmed in the ordering information section of the official Atmel summary datasheet and applies to the U4A14-10 variant, which corresponds to the 40-pin QFN package with industrial-grade screening.
How much user-defined nonvolatile storage does the AT97SC3204-U4A14-10 provide?
The AT97SC3204-U4A14-10 provides 1756 bytes of dedicated, write-protected nonvolatile storage for user-defined data. This space is separate from the TPM's internal object storage and is accessible via standardized TCG commands such as TPM_NV_WriteValue and TPM_NV_ReadValue-enabling OEMs to store platform-specific keys, certificates, or configuration parameters securely.
Is the AT97SC3204-U4A14-10 FIPS 140-2 certified?
The AT97SC3204-U4A14-10 incorporates a hardware Random Number Generator (RNG) that is FIPS 140-2 compliant, as stated in the official Atmel summary datasheet. While the full module certification status depends on system-level validation, the RNG subsystem itself meets FIPS 140-2 Annex C requirements for entropy sources, making the AT97SC3204-U4A14-10 suitable for deployments requiring NIST-validated randomness.
What microprocessor core is used inside the AT97SC3204-U4A14-10?
The AT97SC3204-U4A14-10 integrates an Atmel AVR 8-bit RISC microprocessor core. This core executes the certified TPM firmware directly on-die and manages all cryptographic operations, GPIO control, and LPC protocol handling-eliminating the need for an external controller and reducing system-level attack surface.
AT97SC3204-U4A14-10 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
AT97SC3204-U4A14-10 FAQ
1.How can I place an order for AT97SC3204-U4A14-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3204-U4A14-10 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-U4A14-10 reliable?
The price and inventory of AT97SC3204-U4A14-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3204-U4A14-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3204-U4A14-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3204-U4A14-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3204-U4A14-10?
AT97SC3204-U4A14-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3204-U4A14-10 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-U4A14-10?
For technical support, including AT97SC3204-U4A14-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3204-U4A14-10 requirements.
6.How does Aetrix verify that AT97SC3204-U4A14-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3204-U4A14-10 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-U4A14-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3204-U4A14-10?
All AT97SC3204-U4A14-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3204-U4A14-10, 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-U4A14-10 part is unused and in its original packaging.
Return procedure for AT97SC3204-U4A14-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3204-U4A14-10 Tags
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