GENERAL DESCRIPTION

The PCF7x41ATJ is a high performance single chip Security Transponder and RISC Controller, ideally suited for automotive applications with combined vehicle Immobilization and Remote Keyless Entry functions.

FEATURES

• Single chip Security Transponder and Remote Keyless

Entry solution

• RISC programmable device features

• Up to seven Keyless Entry command buttons

• 512 Byte EEPROM for extended data storage

• 32 bit unique device and product type identification

• Package integrated Transponder LF coil

Security Transponder

• Transponder operation like PCF7936 family

• Fast mutual authentication, 39ms (48 bit Secret Key)

• EEPROM read/write protection capability

• RISC programmable transponder extensions

Calculation Unit

• Hardwired security algorithm

• 48 (96) bit Secret Key

RISC Controller and Peripherals

• 8 Bit RISC Architecture (MRK )

• 4 kByte E-ROM respectively ROM (application)

• 4 kByte ROM (device firmware and library functions)

• 128 Byte User RAM

• 11 general purpose I/O (incl. 7 command button inputs)

• Two 8 Bit Timer/Counter

• Optional external clock input for Timer/Counter

• Watchdog

• Single level interrupt architecture

• On-chip RC Oscillator (< 8)

• Short instruction execution time (as fast as 0.5 s)

• Programmable battery low detection

• Low power consumption

RUN: 300 A, IDLE: 20A, PD: 100 nA

• Single Lithium cell operation, 2.1V to 3.6V