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HCS500-P Datasheet

  • HCS500-P

  • KEELOQ CODE HOPPING ENCODER

  • 315.27KB

  • 24頁

  • MICROCHIP   MICROCHIP

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M
FEATURES
Security
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Encrypted storage of manufacturer鈥檚 code
Encrypted storage of encoder keys
Up to seven transmitters can be learned
K
EE
L
OQ
code hopping technology
Normal and secure learning mechanisms
HCS500
Code Hopping Decoder
PACKAGE TYPE
PDIP, SOIC
V
DD
EE_CLK
EE_DAT
MCLR
1
HCS500
2
3
4
8
7
6
5
V
SS
RFIN
S_CLK
S_DAT
Operating
鈥?3.0V鈥?.5V operation
鈥?Internal oscillator
鈥?Auto bit rate detection
BLOCK DIAGRAM
RFIN
67-bit Reception Register
DECRYPTOR
EE_DAT
External
EEPROM
CONTROL
EE_CLK
S_DAT
S_CLK
Other
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Stand-alone decoder chipset
External EEPROM for transmitter storage
Synchronous serial interface
1 Kbit user EEPROM
8-pin DIP/SOIC package
Typical Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Automotive remote entry systems
Automotive alarm systems
Automotive immobilizers
Gate and garage openers
Electronic door locks
Identity tokens
Burglar alarm systems
OSCILLATOR
MCLR
The manufacturer鈥檚 code, encoder keys, and synchro-
nization information are stored in encrypted form in
external EEPROM. The HCS500 uses the S_DAT and
S_CLK inputs to communicate with a host controller
device.
The HCS500 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.
Compatible Encoders
鈥?HCS200, HCS300, HCS301, HCS360,
HCS410 (PWM Mode)
DESCRIPTION
The Microchip Technology Inc. HCS500 is a code hop-
ping decoder designed for secure Remote Keyless
Entry (RKE) systems. The HCS500 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
HCS500 can be used as a stand-alone decoder or in
conjunction with a microcontroller.
K
EE
L
OQ
is a registered trademark of Microchip Technology Inc.
*Code hopping patents issued in Europe, U.S.A; and R.S.鈥擴S:5,517,187; Europe: 0459781
漏
1997 Microchip Technology Inc.
Preliminary
DS40153B-page 1

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