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Microchip Technology - KEELOQ CODE HOPPING DECODER

Numéro de référence HCS515-P
Description KEELOQ CODE HOPPING DECODER
Fabricant Microchip Technology 
Logo Microchip Technology 





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HCS515-P fiche technique
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HCS515
Code Hopping Decoder
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
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
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,
HCS410 (PWM Mode)
DESCRIPTION
The Microchip Technology Inc. HCS515 is a code hop-
ping decoder designed for secure Remote Keyless
Entry (RKE) systems. The HCS515 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 and access control systems. The
HCS515 can be used as a stand-alone decoder or in
conjunction with a microcontroller.
PACKAGE TYPE
PDIP, SOIC
NC
NC
Vdd
S0
S1
MCLR
NC
1
2
3
4
5
6
7
14 NC
13 NC
12 Vss
11 RF_IN
10 S_CLK
9 S_DAT
8 NC
BLOCK DIAGRAM
RFIN
67-bit Reception Register
Internal
EEPROM
EE_DAT
EE_CLK
CONTROL
OSCILLATOR
DECRYPTOR
S_DAT
S_CLK
S0
S1
MCLR
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 name, KEELOQ logo, and logotype are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries.
*Code hopping patents issued in Europe, U. S. A. and R. S.—US:5,517,187; Europe: 0459781
© 1998 Microchip Technology Inc.
Preliminary
DS40183A-page 1

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