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HCS412I Datasheet(PDF) 1 Page - Microchip Technology |
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HCS412I Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 44 page  © 2002 Microchip Technology Inc. Preliminary DS41099C-page 1 FEATURES Security • Programmable 64-bit encoder crypt key • Two 64-bit IFF keys • Keys are read protected • 32-bit bi-directional challenge and response using one of two possible keys • 69-bit transmission length • 32-bit hopping code, • 37-bit nonencrypted portion • Programmable 28/32-bit serial number • 60-bit, read protected seed for secure learning • Two IFF encryption algorithms • Delayed counter increment mechanism • Asynchronous transponder communication • Transmissions include button Queuing information Operating • 2.0V to 6.3V operation • Three switch inputs: S2, S1, S0 – seven functions • Battery-less bi-directional transponder capability • Selectable baud rate and code word blanking • Automatic code word completion • Battery low detector • PWM or Manchester data encoding • Combined transmitter, transponder operation • Anticollision of multiple transponders • Passive proximity activation • Device protected against reverse battery • Intelligent damping for high Q LC-circuits • 100 mVPP sensitive LC input Typical Applications • Automotive remote entry systems • Automotive alarm systems • Automotive immobilizers • Gate and garage openers • Electronic door locks (Home/Office/Hotel) • Burglar alarm systems • Proximity access control PACKAGE TYPES BLOCK DIAGRAM Other • Simple programming interface • On-chip tunable RC oscillator, ± 10% • On-chip EEPROM • 64-bit user EEPROM in Transponder mode • Battery-low LED indication • Serialized Quick Turn Programming (SQTP SM ) • 8-pin PDIP/SOIC • RF Enable output • ASK and FSK PLL interface option • Built in LC input amplifier S0 S1 S2/RFEN/LC1 LC0 VDD LED DATA GND 18 2 3 4 7 6 5 PDIP, SOIC Oscillator Configuration Register Power Control Wake-up Logic Address Decoding EEPROM Debounce Control and Queuer LED Control DATA Driver PPM Detector DATA PPM Manch. Encoder VDD S0 S1 LED LC0 DATA RFEN/S2/LC1 HCS412 KEELOQ® Code Hopping Encoder and Transponder |
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