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HCS360-IP Datasheet(PDF) 1 Page - Microchip Technology |
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HCS360-IP Datasheet(HTML) 1 Page - Microchip Technology |
1 / 24 page © 1996 Microchip Technology Inc. Preliminary DS40152C-page 1 M Code Hopping Encoder FEATURES Security • Programmable 28/32-bit serial number • Programmable 64-bit encryption key • Each transmission is unique • 67-bit transmission code length • 32-bit hopping code • 35-bit fixed code (28/32-bit serial number, 4/0-bit function code, 1-bit status, 2-bit CRC) • Encryption keys are read protected Operating • 2.0-6.6V operation • Four button inputs - 15 functions available • Selectable baud rate • Automatic code word completion • Battery low signal transmitted to receiver • Nonvolatile synchronization data • PWM and Manchester modulation Other • Easy to use programming interface • On-chip EEPROM • On-chip oscillator and timing components • Button inputs have internal pull-down resistors • Current limiting on LED output • Minimum component count Enhanced Features Over HCS300 • 48-bit seed vs. 32-bit seed • 2-bit CRC for error detection • 28/32-bit serial number select • Two seed transmission methods • PWM and Manchester modulation • IR modulation mode Typical Applications The HCS360 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 HCS360 BLOCK DIAGRAM DESCRIPTION The HCS360 is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS360 utilizes the KEELOQ code hopping technology, which incorporates high security, a small package outline and low cost, to make this device a perfect solution for unidirectional remote keyless entry systems and access control systems. The HCS360 combines a 32-bit hopping code generated by a nonlinear encryption algorithm, with a 28/32-bit serial number and 7/3 status bits to create a 67-bit transmission stream. The length of the transmission eliminates the threat of code scanning and the code hopping mechanism makes each transmission unique, thus rendering code capture and resend (code grabbing) schemes useless. 1 2 3 4 8 7 6 5 S0 S1 S2 S3 VDD LED PWM VSS PDIP, SOIC VSS VDD Oscillator Reset circuit LED driver Controller Power latching and switching Button input port 32-bit shift register Encoder EEPROM PWM LED S3 S2 S1 S0 HCS360 KEELOQ is a registered trademark of Microchip Technology Inc. *Code hopping encoder patents issued in Europe, U. S. A., R. S. A. — US: 5,517,187; Europe: 0459781 |
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