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HCS360

Microchip Technology
Part Number HCS360
Manufacturer Microchip Technology
Description KEELOQ CODE HOPPING ENCODER
Published Mar 23, 2005
Detailed Description M FEATURES Security • • • • • • Programmable 28/32-bit serial number Programmable 64-bit encryption key Each transmissio...
Datasheet PDF File HCS360 PDF File

HCS360
HCS360

Overview
M 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 HCS360 Code Hopping Encoder PACKAGE TYPES PDIP, SOIC S0 S1 S2 S3 1 HCS360 2 3 4 8 7 6 5 VDD LED PWM VSS 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 HCS360 BLOCK DIAGRAM Oscillator Reset circuit LED LED driver Controller Power latching and switching EEPROM Encoder 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 PWM 32-bit shift register VSS VDD Button input port 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 S3 S2 S1 S0 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 usel...


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