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HCS515-P

Description
KEELOQ CODE HOPPING DECODER
File Size128KB,28 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
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HCS515-P Overview

KEELOQ CODE HOPPING DECODER

M
FEATURES
Security
Encrypted storage of manufacturer’s code
Encrypted storage of encoder decryption keys
Up to seven transmitters can be learned
K
EE
L
OQ
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 hop-
ping decoder designed for secure Remote Keyless
Entry (RKE) systems. The HCS515 utilizes the pat-
ented K
EE
L
OQ
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.
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 K
EE
L
OQ
name, K
EE
L
OQ
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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