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HCS500 数据表(PDF) 1 Page - Microchip Technology

部件名 HCS500
功能描述  KEELOQ짰 Code Hopping Decoder encoders to implement a unidirectional
PDF  40 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

HCS500 数据表(HTML) 1 Page - Microchip Technology

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© 2011 Microchip Technology Inc.
DS40153D-page 1
HCS500
FEATURES
Security
• Encrypted storage of manufacturer’s code
• Encrypted storage of crypt 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 chipset
• External EEPROM for transmitter storage
• Synchronous serial interface
• 1 Kbit user EEPROM
• 8-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
All KEELOQ encoders and transponders configured for
the following setting:
• PWM modulation format (1/3-2/3)
•TE in the range from 100us to 400us
• 10 x TE Header
• 28-bit Serial Number
• 16-bit Synchronization counter
• Discrimination bits equal to Serial Number 8 LSbs
• 66- to 69-bit length code word.
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 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
HCS500 can be used as a stand-alone decoder or in
conjunction with a microcontroller.
PACKAGE TYPE
BLOCK DIAGRAM
The manufacturer’s code, crypt keys, and synchroniza-
tion 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.
PDIP, SOIC
1
2
3
4
VDD
EE_CLK
EE_DAT
MCLR
8
7
6
5
VSS
RFIN
S_CLK
S_DAT
Reception Register
External
CONTROL
DECRYPTOR
RFIN
OSCILLATOR
S_DAT
S_CLK
MCLR
EEPROM
EE_DAT
EE_CLK
KEELOQ® Code Hopping Decoder


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