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HCS365 Datasheet(PDF) 1 Page - Microchip Technology |
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HCS365 Datasheet(HTML) 1 Page - Microchip Technology |
1 / 40 page © 2011 Microchip Technology Inc. DS41109E-page 1 KEELOQ® Code Hopping Encoder FEATURES Security • Two programmable 32-bit serial numbers • Two programmable 64-bit crypt keys • Two programmable 60-bit seed values • Each transmission is unique • 67/69-bit transmission code length • 32-bit hopping code • Crypt keys are read protected Operating • 2.05-5.5V operation • Four button inputs • 15 functions available • Four selectable baud rates • Selectable minimum code word completion • Battery low signal transmitted to receiver • Nonvolatile synchronization data • PWM, VPWM, PPM, and Manchester modulation • Button queue information transmitted • Dual Encoder functionality Other • On-chip EEPROM • On-chip tuned oscillator (±10% over voltage and temperature) • Button inputs have internal pull-down resistors •LED output • PLL control for ASK and FSK • Low external component count Typical Applications The HCS365 is ideal for Remote Keyless Entry (RKE) applications. These applications include: • Automotive RKE systems • Automotive alarm systems • Automotive immobilizers • Gate and garage door openers • Identity tokens • Burglar alarm systems PACKAGE TYPES HCS365 BLOCK DIAGRAM GENERAL DESCRIPTION The HCS365 is a code hopping encoder designed for secure Remote Keyless Entry (RKE) and secure remote control systems. The HCS365 utilizes the KEELOQ® code hopping technology, which incorpo- rates high security, a small package outline, and low cost to make this device a perfect solution for unidirec- tional authentication systems and access control sys- tems. The HCS365 combines a hopping code generated by a nonlinear encryption algorithm, a serial number, and status bits to create a secure transmission code. The length of the transmission eliminates the threat of code scanning and code grabbing access techniques. 1 2 3 4 8 7 6 5 S0 S1 S2 S3/SHIFT/ VDD LED DATA Vss PDIP, SOIC RFEN VSS VDD Oscillator RESET circuit LED driver Controller Power latching and switching Button input port 32-bit SHIFT register Encoder EEPROM DATA LED S3/SHIFT S2 S 1 S 0 RFEN HCS365 |
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