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Microchip Technology AT97SC3205-H3M4200B
- Part No.:
- AT97SC3205-H3M4200B
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205-H3M4200B.pdf
- Description:
- PRODSTD IND SPI TPM 4X4 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,088
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Product details
Overview
AT97SC3205-H3M4200B from Atmel is a TCG-compliant Trusted Platform Module (TPM) 1.2 security IC implementing hardware-based RSA key generation, FIPS-140-2 certified crypto engines (RNG, HMAC, AES, SHA, RSA), and 2066-byte NV user storage. It integrates an AVR RISC microprocessor and operates at 3.3V with SPI interface up to 33MHz in PC client platforms.
For engineers reviewing the AT97SC3205-H3M4200B datasheet, AT97SC3205-H3M4200B pinout, AT97SC3205-H3M4200B application, or AT97SC3205-H3M4200B equivalent, this page delivers verified package mapping (32-pad QFN), confirmed SPI-TIS 1.3 compliance, FIPS-140-2 module certification scope, GPIO Express-00/PP/GPIO roles, and industrial temperature support (-40°C to +85°C).
Technical Context
The AT97SC3205-H3M4200B implements TCG TPM 1.2 and PC Client-Specific TIS 1.3 via dedicated SPI interface with PIRQ# interrupt signaling and SPI_RST# reset control. Its internal architecture combines an AVR 8-bit RISC CPU, EEPROM-resident RSA key storage, and a FIPS-140-2 certified hardware crypto engine including RNG, HMAC, AES, SHA, and RSA accelerators.
It supports dynamic internal memory management for multiple RSA keys without host intervention beyond standard TCG commands (TPM_FlushSpecific, TPM_LoadKey2), and provides tamper detection via XTamper functionality on TestBI/GPIO/XTamper pin. The device enters low-power state automatically during idle periods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM Specification v1.2 and PC Client-Specific TIS v1.3 - ensures interoperability with BIOS, OS drivers, and TCG-compliant firmware stacks. |
| SPI Interface Speed | Up to 33MHz typical in PC operation - matches standard motherboard SPI bus timing without clock stretching or protocol adaptation. |
| FIPS Certification | FIPS-140-2 Level 2 certified module - validates cryptographic integrity of RNG, HMAC, AES, SHA, and RSA engines for government and regulated deployments. |
| NV Storage Capacity | 2066 bytes user-defined data space - enables persistent storage of platform configuration, credentials, or attestation logs without external EEPROM. |
| Supply Voltage | 3.3V ±10% - compatible with standard PC/platform power rails; requires 2200–4700pF decoupling capacitors within 5mm of each VCC pin. |
| Operating Temperature | -40°C to +85°C industrial range - supports deployment in embedded systems with extended thermal envelopes beyond commercial PCs. |
| Package Type | 32-pad QFN (32M3), 4.0 × 4.0 × 0.9 mm, 0.4 mm pitch - surface-mountable with exposed thermal pad tied to GND for reliable thermal dissipation. |
Pinout & Package
AT97SC3205-H3M4200B uses the 32-pad QFN (32M3) package: 4.0 × 4.0 × 0.9 mm body, 0.4 mm lead pitch, exposed center thermal pad internally connected to GND. Pin 1 marked by corner cut; substrate pad must be soldered to GND plane for thermal and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3V main supply; requires local 2200–4700pF decoupling within 5mm of each pin and 0.1μF bulk capacitor near chip node. |
| GND | Ground reference | System ground return; center thermal pad is internally tied to GND and must be soldered to PCB ground plane. |
| MISO / MOSI / SPI_CLK / SPI_CS# / SPI_RST# | SPI interface signals | Full-duplex SPI slave interface compliant with TIS 1.3; SPI_RST# pulse ≥2μs resets internal state identically to power cycle. |
| PIRQ# | Interrupt output | Active-low interrupt signal asserted by TPM to notify host of command completion or event; must be pulled to GND if unused. |
| PP/GPIO | Physical presence indicator | Hardware Physical Presence input (active-high); used to authorize sensitive operations like clearing owner hierarchy; internal pull-down. |
| GPIO Express-00 | GPIO with NV index mapping | Maps to TPM_NV_INDEX_GPIO_00; internal pull-up; serves as XOR chain output in I/O test mode; leave floating if unused. |
| TestBI/GPIO/XTamper | Multi-function terminal | Configurable as GPIO, external tamper input (active-high), or manufacturing test pin; tie to GND via 4.7kΩ if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Asymmetric Crypto Engine | On-die RSA key generation and signing acceleration eliminates software-based crypto bottlenecks and side-channel exposure in host CPU. |
| Internal EEPROM for RSA Keys | Dedicated non-volatile storage protects private keys from extraction; key lifecycle managed autonomously per TCG command set. |
| FIPS-140-2 Certified RNG | High-quality entropy source validated for cryptographic key derivation and protocol randomness; usable by host system via TCG commands. |
| Turnkey TPM Firmware | Fully integrated, pre-certified firmware eliminates need for customer validation; includes BIOS driver support and manufacturing initialization tools. |
| GPIO Express-00 with NV Index | Enables persistent, TPM-protected GPIO state storage (TPM_NV_INDEX_GPIO_00), allowing secure boot-state signaling across reboots. |
Applications
| Secure Boot Authentication | Platform Configuration Integrity |
|---|---|
|
Use Scenario: Verifying firmware signature and measuring boot sequence before loading OS kernel in UEFI-based PCs. IC Role / Device Role / Timing Role: TPM performs SHA-1/SHA-256 hashing of boot components and stores PCR values in protected registers. Use Value: Prevents unauthorized firmware modification by binding boot measurements to hardware-rooted keys stored in AT97SC3205-H3M4200B EEPROM. |
Use Scenario: Detecting unauthorized changes to BIOS settings, peripheral configurations, or hardware inventory in enterprise desktops. IC Role / Device Role / Timing Role: AT97SC3205-H3M4200B captures and seals configuration hashes into Platform Configuration Registers (PCRs) during POST. Use Value: Enables remote attestation via TCG protocols using FIPS-certified SHA and RSA engines inside AT97SC3205-H3M4200B. |
| Hardware-Based Disk Encryption Key Binding | Secure Credential Storage for Embedded Gateways |
|
Use Scenario: Binding BitLocker or LUKS encryption keys to specific hardware in Windows/Linux laptops. IC Role / Device Role / Timing Role: AT97SC3205-H3M4200B wraps and unwraps disk encryption keys using RSA asymmetric cryptography. Use Value: Ensures encrypted drives remain inaccessible if removed from original platform-enforced by AT97SC3205-H3M4200B's isolated key storage and crypto engine. |
Use Scenario: Storing TLS certificates, API tokens, and device identity keys in industrial IoT gateways requiring long-term security. IC Role / Device Role / Timing Role: AT97SC3205-H3M4200B provides 2066-byte NV storage with write-lock capability and tamper-aware GPIO monitoring. Use Value: Protects credentials against firmware-level attacks using FIPS-140-2 certified AES and HMAC engines within AT97SC3205-H3M4200B. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM security module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon SLB9665TT2.0 | TPM 2.0 compliant; supports ECC and SHA-256 natively; larger 48-pin TQFP package; no AVR core. | Required for new designs targeting Windows 11 or Linux systems mandating TPM 2.0; lacks GPIO Express-00 NV indexing. | Select when upgrading to TPM 2.0 standards; verify BIOS/firmware compatibility and layout space for larger footprint. |
| Nuvoton NPCT750YX | TPM 1.2 compliant; SPI interface; 32-pin QFN; FIPS-140-2 Level 2 certified; no integrated AVR processor. | Drop-in replacement for legacy TPM 1.2 systems; identical pinout and voltage but different GPIO mapping and NV storage size (1280 bytes). | Consider for cost-sensitive replacements where AT97SC3205-H3M4200B's 2066-byte NV space is not required. |
Compared with Infineon SLB9665TT2.0 and Nuvoton NPCT750YX, the AT97SC3205-H3M4200B offers unique integration of AVR RISC core and GPIO Express-00 NV indexing, enabling custom secure boot logic and persistent GPIO state-features absent in both alternatives.
Availability
AT97SC3205-H3M4200B is available at Aetrix Electronics and suitable for secure boot authentication, platform integrity verification, hardware-based disk encryption, and embedded credential storage requiring stable component supply across industrial and enterprise computing programs.
Supply support for AT97SC3205-H3M4200B 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 AT97SC3205 product line delivers turnkey TPM 1.2 modules designed specifically for PC client platforms and embedded systems requiring FIPS-140-2 certified hardware security, with integrated crypto engines and trusted firmware.
FAQ
What is the operating temperature range supported by the AT97SC3205-H3M4200B?
The AT97SC3205-H3M4200B is rated for industrial temperature operation from -40°C to +85°C. This range is explicitly specified in the ordering information and validated across all electrical and cryptographic functions, making it suitable for deployment in harsh-environment embedded systems beyond standard commercial PCs.
Does the AT97SC3205-H3M4200B support TPM 2.0?
No, the AT97SC3205-H3M4200B implements only TCG TPM Specification Version 1.2 and PC Client-Specific TIS Version 1.3. It does not support TPM 2.0 algorithms (e.g., ECC, SHA-256 as default), commands, or authorization structures. For TPM 2.0 compliance, consider Infineon SLB9665TT2.0 or newer Microchip TPM offerings.
How is the 2066-byte NV storage in the AT97SC3205-H3M4200B allocated and accessed?
The AT97SC3205-H3M4200B provides 2066 bytes of user-defined NV storage accessible via TCG-defined commands (e.g., TPM_NV_Write, TPM_NV_Read). Space is partitioned into indices with configurable attributes (write lock, read lock, authorization requirements); GPIO Express-00 maps to TPM_NV_INDEX_GPIO_00 for persistent state retention.
What are the decoupling requirements for VCC pins on the AT97SC3205-H3M4200B?
The AT97SC3205-H3M4200B requires individual 2200–4700pF high-quality (X5R/X7R) decoupling capacitors placed within 5mm of each VCC pin and adjacent GND pin. A 0.1μF bulk capacitor must be located at the VCC node junction, within 10mm of the chip. All capacitors must be closer to the VCC pin than any other component.
Is the AT97SC3205-H3M4200B pin-compatible with other Atmel TPM variants like AT97SC3204?
No documented pin-to-pin compatibility exists between AT97SC3205-H3M4200B and AT97SC3204. The AT97SC3204 uses a 28-pin TSSOP package with different pin count, spacing, and signal assignment (e.g., no TestBI/GPIO/XTamper multiplexing). Layout redesign is required for substitution.
AT97SC3205-H3M4200B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Trusted Platform Module (TPM)
- Core Processor:
- AVR
- Program Memory Type:
- EEPROM
- Controller Series:
- -
- RAM Size:
- -
- Interface:
- SPI
- Number of I/O:
- 4
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
AT97SC3205-H3M4200B FAQ
1.How can I place an order for AT97SC3205-H3M4200B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205-H3M4200B 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 AT97SC3205-H3M4200B reliable?
The price and inventory of AT97SC3205-H3M4200B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205-H3M4200B is usually 5 days.
3.What payment methods are accepted for AT97SC3205-H3M4200B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205-H3M4200B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205-H3M4200B?
AT97SC3205-H3M4200B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205-H3M4200B 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 AT97SC3205-H3M4200B?
For technical support, including AT97SC3205-H3M4200B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205-H3M4200B requirements.
6.How does Aetrix verify that AT97SC3205-H3M4200B is sourced from the original manufacturer or authorized distributors?
All AT97SC3205-H3M4200B 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 AT97SC3205-H3M4200B meets industry standards.
7.What is the process for return or replacement of AT97SC3205-H3M4200B?
All AT97SC3205-H3M4200B units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205-H3M4200B, 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 AT97SC3205-H3M4200B part is unused and in its original packaging.
Return procedure for AT97SC3205-H3M4200B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205-H3M4200B Tags
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CYPD3175-24LQXQ
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