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Microchip Technology AT97SC3205-H3M45-00
- Part No.:
- AT97SC3205-H3M45-00
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205-H3M45-00.pdf
- Description:
- FF IND SPI TPM 4X4 32VQFN CEK -
- Quantity:
- Payment:
- Shipping:
Inventory:2,192
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Product details
Overview
AT97SC3205-H3M45-00 from Microchip Technology (formerly Atmel) is a single-chip Trusted Platform Module (TPM) implementing TCG TPM 1.2 and PC Client TIS 1.3 specifications, featuring an AVR RISC microprocessor, hardware RSA crypto engine, FIPS-140-2 certified RNG/AES/SHA/HMAC engines, and 2066-byte NV user storage. It operates at 3.3V with SPI interface up to 45MHz and supports industrial temperature range (−40°C to +85°C).
For engineers reviewing the AT97SC3205-H3M45-00 datasheet, AT97SC3205-H3M45-00 pinout, AT97SC3205-H3M45-00 application, or AT97SC3205-H3M45-00 equivalent, this page provides verified package mapping (32-pad QFN), confirmed SPI-based TPM system integration details, TCG compliance scope, internal key management behavior, and validated alternative options for PC client and embedded security designs.
Technical Context
The AT97SC3205-H3M45-00 integrates an 8-bit AVR RISC CPU with dedicated cryptographic hardware including FIPS-140-2 certified RNG, AES-128, SHA-1, HMAC-SHA1, and RSA-2048 engines. Its dynamic internal memory management handles multiple RSA keys without host intervention beyond standard TCG commands (TPM_FlushSpecific, TPM_LoadKey2).
It implements the TCG PC Client-Specific TPM Interface Specification (TIS) v1.3 over SPI, supporting active-low PIRQ# interrupt signaling, SPI_CS#, SPI_RST#, and SPI_CLK with power-aware clock gating. The device enters low-power state automatically during idle and requires no external control for power-state transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 and PC Client TIS 1.3 - enables interoperable secure boot, attestation, and key sealing in Windows/Linux PC platforms |
| SPI Interface Speed | Up to 45 MHz - supports high-throughput command/response cycles; typical PC operation at 24–33 MHz ensures timing margin |
| Supply Voltage | 3.3 V ±10% - requires tight decoupling: 2200–4700 pF caps within 5 mm of each VCC–GND pair plus 0.1 µF at VCC node |
| Temperature Range | −40°C to +85°C - qualified for industrial embedded systems requiring extended thermal reliability |
| NV Storage Capacity | 2066 bytes user-defined data - persistent nonvolatile storage for platform-specific credentials or policy variables |
| FIPS Certification | FIPS-140-2 Level 2 - covers RNG, HMAC, AES, SHA, and RSA engines; validates cryptographic integrity for government/compliance use |
| Package Type | 32-pad QFN (32M3), 4.0 × 4.0 × 0.9 mm, 0.4 mm pitch - exposes GND center pad; RoHS-compliant, lead-free |
Pinout & Package
AT97SC3205-H3M45-00 uses the 32-pad QFN (32M3) package: 4.0 × 4.0 × 0.9 mm body, 0.4 mm pitch, exposed GND center pad internally tied to ground. Pinout is defined per Atmel-8884AS-TPM-AT97SC3205-Datasheet-Summary_022014.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3.3 V main supply; requires local 2200–4700 pF decoupling ≤5 mm from adjacent GND pins |
| GND | Ground reference | System ground; center pad is internally connected to GND and may be left floating or soldered to PCB ground plane |
| MISO | SPI data output | Master-In-Slave-Out; drives TPM response data to host controller on SPI bus |
| MOSI | SPI data input | Master-Out-Slave-In; receives TPM command packets and parameters from host |
| SPI_CS# | SPI chip select | Active-low enable; must be asserted before SPI_CLK to initiate valid transaction sequence |
| SPI_CLK | SPI clock input | Drives synchronous communication; must stabilize before SPI_RST# release per TCG power-up timing |
| PIRQ# | SPI interrupt output | Active-low interrupt signal indicating pending TPM response or event; requires pull-down if unused |
| SPI_RST# | SPI reset input | Active-low hard reset; ≥2 µs pulse required; must remain asserted until VCC and SPI_CLK stabilize |
| PP/GPIO | Physical presence indicator | Hardware physical presence detection (active-high); also configurable as GPIO with internal pull-down |
| GPIO Express-00 | GPIO with NV index mapping | Maps to TPM_NV_INDEX_GPIO_00; internal pull-up; default input mode; floats when unused |
| TestBI/GPIO/XTamper | Multi-function terminal | Supports tamper detection (XTamper), GPIO, or test mode; active-high; tie to GND via 4.7 kΩ if unused |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Asymmetric Crypto Engine | Integrated RSA-2048 engine accelerates key generation and signature operations offloading host CPU and preventing software-side key exposure |
| FIPS-140-2 Certified RNG | Validated entropy source enabling cryptographically secure key derivation and protocol nonces meeting federal compliance requirements |
| Internal EEPROM for RSA Keys | Dedicated nonvolatile storage protects private keys from extraction; keys never leave chip boundary during normal operation |
| Dynamic Key Cache Management | Automatic handling of multiple loaded keys using TPM_FlushSpecific/TPM_LoadKey2; eliminates need for host-side key scheduling logic |
| Secure Firmware Integration | Turnkey solution with pre-flashed, tamper-resistant firmware compliant to TCG 1.2; no field reprogramming required for standard use |
Applications
| PC Platform Secure Boot | Industrial Embedded Device Authentication |
|---|---|
Use Scenario: BIOS/UEFI firmware verifies boot chain integrity before loading OS kernel and drivers. IC Role / Device Role / Timing Role: TPM acts as root-of-trust anchor; measures PCR registers during POST and signs attestation reports upon request. Use Value: Prevents unauthorized firmware modification by binding boot measurements to hardware-bound keys stored in AT97SC3205-H3M45-00's protected EEPROM. | Use Scenario: Remote edge gateway authenticates firmware updates before installation using digital signatures. IC Role / Device Role / Timing Role: AT97SC3205-H3M45-00 verifies update package signatures via RSA-2048 and stores update policy in its 2066-byte NV space. Use Value: Ensures only cryptographically signed, OEM-authorized firmware executes-critical for unattended industrial deployments. |
| Server Hardware Attestation | Trusted Configuration Storage |
Use Scenario: Cloud infrastructure provider validates physical server identity and configuration before admitting into tenant pool. IC Role / Device Role / Timing Role: TPM generates quote structures containing PCR values and signs them with endorsement key (EK) stored in AT97SC3205-H3M45-00. Use Value: Enables remote attestation with verifiable hardware provenance-no software-only trust assumptions required. | Use Scenario: Medical imaging device stores calibration parameters and regulatory audit logs in tamper-evident storage. IC Role / Device Role / Timing Role: AT97SC3205-H3M45-00 provides 2066-byte NV space write-protected under TPM owner authorization. Use Value: Meets IEC 62304 and FDA data integrity requirements by ensuring configuration data cannot be altered without cryptographic proof. |
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 SLB9670 | TPM 2.0 compliant; supports SHA-256, ECC, and stronger algorithms; larger 48-pin TQFP package | Required for new Windows 11/Server 2022 deployments; not backward-compatible with legacy TPM 1.2 BIOS stacks | Select SLB9670 only when upgrading to TPM 2.0 mandates; AT97SC3205-H3M45-00 remains optimal for existing TPM 1.2 platforms. |
| Nuvoton NPCT750 | TPM 1.2 compliant; SPI interface; integrated voltage supervisor and watchdog; 32-pin QFN same footprint | Includes additional system monitoring features; slightly higher current draw; identical pinout enables drop-in replacement in many layouts | NPCT750 offers enhanced system supervision but requires validation of voltage supervisor interaction; verify compatibility with existing BIOS TPM initialization flow. |
Compared with SLB9670 and NPCT750, AT97SC3205-H3M45-00 delivers verified TCG 1.2 compliance in a compact QFN with minimal external components, making it ideal for cost-sensitive industrial designs where TPM 2.0 migration is not yet required.
Availability
AT97SC3205-H3M45-00 is available at Aetrix Electronics and suitable for PC motherboard design, industrial gateway authentication, and medical device secure configuration storage requiring stable component supply across long production lifecycles.
Supply support for AT97SC3205-H3M45-00 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 communications markets.
The AT97SC3205 product line delivers turnkey TPM 1.2 modules targeting PC client platforms and embedded systems needing hardware-rooted trust, secure key storage, and FIPS-certified cryptographic acceleration without host CPU overhead.
FAQ
What TCG specifications does the AT97SC3205-H3M45-00 implement?
The AT97SC3205-H3M45-00 implements Trusted Computing Group (TCG) TPM Version 1.2 Specification and the PC Client-Specific TPM Interface Specification (TIS) Version 1.3. It is not compliant with TPM 2.0. These specifications define the command set, data structures, and SPI interface timing required for interoperability with Windows BitLocker, Linux tpm-tools, and UEFI firmware stacks that support TPM 1.2.
Does the AT97SC3205-H3M45-00 require external firmware loading?
No, the AT97SC3205-H3M45-00 is a turnkey solution with firmware pre-integrated into ROM and EEPROM. Atmel provided fully qualified, tamper-resistant firmware at manufacture, eliminating the need for field programming or host-based firmware updates. The AT97SC3205-H3M45-00 operates immediately after power-on and SPI initialization without external code execution.
What is the function of the TestBI/GPIO/XTamper pin on the AT97SC3205-H3M45-00?
The TestBI/GPIO/XTamper pin on the AT97SC3205-H3M45-00 serves three roles: manufacturing test input (disabled post-production), general-purpose I/O, or external tamper detection input (active-high). When used for tamper sensing, it triggers internal security responses such as key zeroization. If unused, it must be tied to GND via a 4.7 kΩ resistor per Atmel's design guidance in the summary datasheet.
How is power integrity managed for the AT97SC3205-H3M45-00?
AT97SC3205-H3M45-00 requires strict power integrity: each VCC pin needs a 2200–4700 pF ceramic decoupling capacitor placed ≤5 mm from its adjacent GND pin, plus a shared 0.1 µF capacitor at the VCC node ≤10 mm from the device. All capacitors must be X5R/X7R dielectric. Failure to meet these guidelines risks intermittent operation or failure to meet TCG timing requirements during SPI transactions.
Is the AT97SC3205-H3M45-00 pin-compatible with other Atmel TPM variants?
The AT97SC3205-H3M45-00 uses the 32-pad QFN (32M3) package and shares identical pinout with other AT97SC3205 variants in the same package option (e.g., AT97SC3205-M3M45-00). However, it is not pin-compatible with the 28-pin TSSOP version (AT97SC3205-H3X45-00) due to differing pin count, layout, and NC assignments. Always verify package suffix and consult the specific variant's pin configuration table.
AT97SC3205-H3M45-00 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- 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:
- 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-H3M45-00 FAQ
1.How can I place an order for AT97SC3205-H3M45-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205-H3M45-00 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 AT97SC3205-H3M45-00 reliable?
The price and inventory of AT97SC3205-H3M45-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205-H3M45-00 is usually 5 days.
3.What payment methods are accepted for AT97SC3205-H3M45-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205-H3M45-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205-H3M45-00?
AT97SC3205-H3M45-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205-H3M45-00 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 AT97SC3205-H3M45-00?
For technical support, including AT97SC3205-H3M45-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205-H3M45-00 requirements.
6.How does Aetrix verify that AT97SC3205-H3M45-00 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205-H3M45-00 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 AT97SC3205-H3M45-00 meets industry standards.
7.What is the process for return or replacement of AT97SC3205-H3M45-00?
All AT97SC3205-H3M45-00 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205-H3M45-00, 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 AT97SC3205-H3M45-00 part is unused and in its original packaging.
Return procedure for AT97SC3205-H3M45-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205-H3M45-00 Tags
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