Datasheet > HC512-I/P

HC512-I/P

更新时间： 2024-09-25 23:54:51

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其他 - ETC		/
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描述
Consumer IC

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数据手册

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HC512-I/P 数据手册

HCS512

KEELOQ Code Hopping Decoder

FEATURES

Security

DESCRIPTION

The Microchip Technology Inc. HCS512 is a code hop-

ping decoder designed for secure Remote Keyless

Entry (RKE) systems. The HCS512 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 keyless entry system.

• Secure storage of Manufacturer’s Code

• Secure storage of transmitter’s keys

• Up to four transmitters can be learned

• KEELOQ code hopping technology

• Normal and secure learning mechanisms

PACKAGE TYPE

Operating

PDIP, SOIC

• 4.0V – 6.0V operation

• 4 MHz external RC oscillator

• Learning indication on LRNOUT

• Auto baud rate detection

• Power saving SLEEP mode

LRNIN

LRNOUT

RFIN

OSCIN

OSCOUT

VDD

MCLR

GND

Other

• Stand-alone decoder

DATA

CLK

• On-chip EEPROM for transmitter storage

• Four binary function outputs–15 functions

• 18-pin DIP/SOIC package

SLEEP

VLOW

Typical Applications

• Automotive remote entry systems

• Automotive alarm systems

• Automotive immobilizers

• Gate and garage openers

• Electronic door locks

BLOCK DIAGRAM

RFIN

Reception Register

DECRYPTOR

• Identity tokens

• Burglar alarm systems

DATA

EEPROM

CONTROL

CLK

Compatible Encoders

LRNIN

All KEELOQ encoders and transponders configured for

the following setting:

MCLR

SLEEP

OSCIN

OSCILLATOR

• PWM modulation format (1/3-2/3)

• TE in the range from 100 µs to 400 µs

• 10 x TE Header

OUTPUT

CONTROL

S3 VLOW LRNOUT

S0 S1

• 28-bit Serial Number

The Manufacturer’s Code, transmitter keys, and syn-

chronization information are stored in protected on-

chip EEPROM. The HCS512 uses the DATA and CLK

inputs to load the Manufacturer’s Code which cannot

be read out of the device.

• 16-bit Synchronization counter

• Discrimination bits equal to Serial Number 8 LSbs

• 66- to 69-bit length code word.

2002 Microchip Technology Inc.

DS40151D-page 1

12 3 4 5 6 7...26

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