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HCS512-P Datasheet(PDF) 1 Page - Microchip Technology |
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HCS512-P Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 20 page  © 1997 Microchip Technology Inc. DS40151C-page 1 M HCS512 FEATURES Security • Secure storage of Manufacturer’s Code • Secure storage of transmitter’s keys • Up to four transmitters can be learned •KEELOQ code hopping technology • Normal and secure learning mechanisms Operating • 3.0V – 6.0V operation • 4 MHz RC oscillator • Learning indication on LRNOUT • Auto baud rate detection • Power saving sleep mode Other • Stand alone decoder • On-chip EEPROM for transmitter storage • Four binary function outputs–15 functions • 18-pin DIP/SOIC package Typical Applications • Automotive remote entry systems • Automotive alarm systems • Automotive immobilizers • Gate and garage openers • Electronic door locks • Identity tokens • Burglar alarm systems Compatible Encoders • HCS200, HCS300, HCS301, HCS360, HCS361 • NTQ106 DESCRIPTION The Microchip Technology Inc. HCS512 is a code hop- ping decoder designed for secure Remote Keyless Entry (RKE) systems. The HCS512 utilizes the pat- ented KEELOQ code hopping system and high security learning mechanisms to make this a canned solution when used with the HCS encoders to implement a uni- directional remote keyless entry system. PACKAGE TYPE BLOCK DIAGRAM The Manufacturer’s Code, transmitter keys, and syn- chronization information are stored in protected on-chip EEPROM. The HCS512 uses the DATA and CLK inputs to load the Manufacturer’s Code which cannot be read out of the device. The HCS512 operates over a wide voltage range of 3.0 volts to 6.0 volts. The decoder employs automatic baud rate detection which allows it to compensate for wide variations in transmitter data rate. The decoder contains sophisticated error checking algorithms to ensure only valid codes are accepted. PDIP, SOIC 1 2 3 4 5 6 7 8 9 LRNIN LRNOUT NC MCLR GND S0 S1 S2 S3 18 17 16 15 14 13 12 11 10 RFIN NC OSCIN OSCOUT VDD DATA CLK SLEEP VLOW S0 S1 S3 S2 VLOW 67-Bit Reception Register EEPROM CONTROL DECRYPTOR OUTPUT SEL RFIN OSCILLATOR OSCIN CONTROL LRNOUT DATA CLK LRNIN MCLR SLEEP Code Hopping Decoder |
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