HCS320 KEELOQ® Code Hopping Encoder
■The HCS320 from Microchip Technology Inc. is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS320 utilizes the code hopping technology which incorporates high security, a small package outline, and low cost, to make this device a perfect solution for unidirectional remote key less entry systems and access control systems.
■The HCS320 combines a 32-bit hopping code generated by a nonlinear encryption algorithm, with a 28-bit serial number and six status bits to create a 66-bit transmission stream. The length of the transmission eliminates the threat of code scanning and the code hopping mechanism makes each transmission unique, thus rendering code capture and resend (code grab bing) schemes useless.
■The crypt key, serial number and configuration data are stored in an EEPROM array which is not accessible via any external connection. The EEPROM data is programmable but read-protected. The data can be verified only after an automatic erase and programming operation. This protects against attempts to gain access to keys or manipulate synchronization values. The HCS320 provides an easy-to-use serial interface for programming the necessary keys, system parameters and configuration data.
●FEATURES:
■Security
▲Programmable 28-bit serial number
▲Programmable 64-bit encryption key
▲Each transmission is unique
▲66-bit transmission code length
▲32-bit hopping code
▲34-bit fixed code (28-bit serial number, 4-bit function code, 2-bit status)
▲Encryption keys are read protected
■Operating
▲3.5V - 13.0V operation
▲Shift key and three inputs
▲16 functions available
▲Selectable baud rate
▲Automatic code word completion
▲Battery low signal transmitted to receiver
▲Battery low indication on LED
▲Non-volatile synchronization data
■Other
▲Easy-to-use programming interface
▲On-chip EEPROM
▲On-chip oscillator and timing components
▲Button inputs have internal pull-down resistors
▲Current limiting on LED output
▲Low external component cost
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[ Automotive RKE systems ][ Automotive alarm systems ][ Automotive immobilizers ][ Gate ][ arage door openers ][ Identity tokens ][ Burglar alarm systems ] |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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June 2011 |
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Rev D |
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DS41097D |
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705 KB |
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