HCS500T-ISLASHST datasheet(1/42 Pages) MICROCHIP

No. de pieza	HCS500T-I/ST

Descripción Electrónicos	KEELOQ짰 Code Hopping Decoder

PDF	42 Pages

Scroll/Zoom	100%

Fabricante Electrónico	MICROCHIP [Microchip Technology]

Página de inicio	http://www.microchip.com

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 2001-2015 Microchip Technology Inc.

DS40000153E-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 PDIP/SOIJ 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 100 us to 400 us

•10 x TE Header

• 28-Bit Serial Number

• 16-Bit Synchronization Counter

• Discrimination Bits Equal to Serial Number

8LSbs

• 66- to 69-Bit Length Code Word.

DESCRIPTION

The Microchip Technology Inc. HCS500 is a code

hopping decoder designed for secure Remote Keyless

Entry (RKE) systems. The HCS500 utilizes the

patented KEELOQ code hopping system and high-

security learning mechanisms to make this a canned

solution when used with the HCS encoders to

implement a unidirectional remote and access control

systems. The HCS500 can be used as a stand-alone

decoder or in conjunction with a microcontroller.

PIN DIAGRAM

FIGURE 1:

BLOCK DIAGRAM

The

manufacturer’s

code,

crypt

keys,

and

synchronization 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, SOIJ

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

Número de pieza similar - HCS500T-I/ST

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