HCS515 Просмотр технического описания (PDF) - Microchip Technology

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HCS515

KEELOQ Code Hopping Decoder

Microchip Technology 

M

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 1

NC 2

Vdd 3

S0 4

S1 5

MCLR 6

NC 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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