KEELOQ CODE HOPPING DECODER
Description
M
FEATURES
Security
• • • • • Encrypted storage of manufacturer’s code Encrypted storage of encoder decryption keys Up to seven transmitters can be learned KEELOQ code hopping technology Normal and secure learning mechanisms
HCS515
Code Hopping Decoder
PACKAGE TYPE
PDIP, SOIC NC NC Vdd S0 S1 MCLR NC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 NC NC Vss RF_IN S_CLK S_DAT NC
HCS515
Operating
• 3.
0V—5.
5V operation • Internal oscillator • Auto bit rate detection
Other
• • • • • Stand-alone decoder Internal EEPROM for transmitter storage Synchronous serial interface 1 Kbit user EEPROM 14-pin DIP/SOIC package
BLOCK DIAGRAM
RFIN 67-bit Reception Register DECRYPTOR EE_DAT Internal EEPROM CONTROL EE_CLK S_DAT S_CLK S0 S1 MCLR
Typical Applications
• • • • • • • Automotive remote entry systems Automotive alarm systems Automotive immobilizers Gate and garage openers Electronic door locks Identity tokens Burglar alarm systems
OSCILLATOR
Compatible Encoders
• HCS200, HCS300, HCS301, HCS360, HCS361, HCS410 (PWM Mode)
DESCRIPTION
The Microchip Technology Inc.
HCS515 is a code hopping decoder designed for secure Remote Keyless Entry (RKE) systems.
The HCS515 utilizes the patented KEELOQ code hopping system and high security learning mechanisms to make this a canned solution when used with the HCS encoders to implement a unidirectional remote and access control systems.
The HCS515 can be used as a stand-alone decoder or in conjunction with a microcontroller.
The manufacturer’s code, encoder decryption keys, and synchronization information are stored in encrypted form in internal EEPROM.
The HCS515 uses the S_DAT and S_CLK inputs to communicate with a host controller device.
The HCS515 operates over a wide voltage range of 3.
0 volts to 5.
5 volts.
The decoder employs automatic bit-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.
The KEELOQ nam...
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