ATA5795 Datasheet, PDF (1/8 Pages) ATMEL Corporation – AES-128 Immobilizer Transponder for Use in Contactless Mode

Features
• AES-128 Immobilizer Transponder for Use in Contactless Mode
• CMMI Certified. Configurable, Secure, Open Source Immobilizer Stack
• Energy Supply and Bi-directional Communication via LF Link (125 kHz)
• 32-bit Unique Identification Number
• Integrated Codecs for Enhanced LF Communication Range
• Fast AES-128 Cryptographic Engine for Both Immobilizer and RKE Functions
• Two 128-bit Secret Keys
• One 128-bit Transport Key
• Embedded Ultra-low-power Atmel^® AVR^® Microcontroller
• Fractional-N RF Transmitter Covering 315 MHz and 433 MHz
• 8-Kbyte Flash for User Application (6 Kbytes) and Immobilizer (2 Kbytes)
• 2112-byte EEPROM for User Data Storage (2 Kbytes) and Device Configuration
(64 Bytes)
• Locking Mechanism Protects both Flash and EEPROM Contents
• Error Correction Code (ECC) Engine Protects both the Flash and EEPROM Units
• 1-wire Debug Interface Integrated with AVR Development Tools
• Automotive Grade C Compiler
• 1.9 to 3.6 V Battery Voltage Range (in Contact Mode)
• –40°C to +105°C Operating Temperature
• Small QFN 32 - 5x5 Package
1. Description
ATA5795 is a smart Remote Keyless Entry (RKE) device that includes an embedded
ultra-low-power AVR 8-bit microcontroller, a fractional-N RF transmitter and an LF
immobilizer interface in a single QFN32 package.
Furthermore, the device has an integrated AES-128 cryptography hardware engine,
which is accessible by both the immobilizer and the RKE unit. The immobilizer inter-
face can run in contactless mode, allowing energy supply and data transmission via
the LF link.
The ATA5795 is designed for automotive applications that necessitate both immobili-
zation and Remote Keyless Entry functions in one single key. It conforms to
requirements of extremely low power consumption and provides all the necessary cir-
cuitry for the entire application.
Embedded AVR
Microcontroller
Including RF
Transmitter and
Immobilizer LF
Functionality
for Remote
Keyless Entry
ATA5795
Summary
Preliminary
NOTE: This is a summary document.
The complete document is available.
For more information, please contact
your local Atmel sales office.
9182AS–RKE–03/10