Key Features

• Compliance: TCG TPM Version 1.2 Specification and TIS Version 1.3
• Single-Chip Solution: All-in-one security module
• Crypto Engine: Hardware asymmetric cryptography
• Microprocessor: Atmel® AVR® RISC Microprocessor
• Internal Storage: EEPROM for RSA Keys
• SPI Protocol: Up to 45MHz (typical PC operating range is 24MHz to 33MHz)
• Secure Design: Secure hardware and firmware design with chip layout
• FIPS-140-2 Certification: Including RNG, HMAC, AES, SHA, and RSA Engines
• NV Storage Space: 2066 bytes for user-defined data
• Supply Voltage: 3.3V
• Package Options: 28-lead Thin TSSOP and 32-pad QFN
• Temperature Ranges: Commercial (0°C to 70°C) and Industrial (-40°C to +85°C)

Pin Configurations and Pinouts

The AT97SC3205 features the following pin configurations:

• VCC: 3.3V Supply Voltage
• GND: Ground
• GPIO: General Purpose Input/Output pins with specific functions
• MISO: SPI Slave Data Output
• MOSI: SPI Slave Data Input
• PIRQ#: SPI Interrupt Requests
• SPI_CLK: SPI Clock Input
• SPI_CS#: SPI Chip Select
• SPI_RST#: SPI Reset Pin
• TestI: Manufacturing Test Input (Disabled)
• TestBI/GPIO/XTamper: Multi-purpose pin for test, GPIO, or tamper indication
• NC: No Connect pins

Block Diagram

The TPM includes:

• Hardware Random Number Generator (RNG)
• Dynamic internal memory management for RSA keys
• Turnkey solution with integrated firmware
• Support for OEM and ODM manufacturers with device driver software and BIOS drivers
• Manufacturing support software for initialization and verification during board assembly

Ordering Information

The AT97SC3205 is available in two package types:

• 28X1: 28-pin thin TSSOP (Lead-free, RoHS compliant)
• 32M3: 32-pad very thin QFN

Package Drawings

28X1 — 28-lead Thin TSSOP

• Body: 4.40mm x 9.70mm, 0.65mm pitch

32M3 — 32-pad QFN

• Body: 4.00mm x 4.00mm, 0.90mm pitch