HCS320 Datasheet

IC型號：
HCS320
PDF描述：
KEELOQ Code Hopping Encoder
文件大?。?/label>
417.48KB
PDF頁數(shù)：
32頁
芯片廠家：
MICROCHIP

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HCS320

OQ廬

Code Hopping Encoder

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)

鈥?Encryption keys are read protected

鈥?/div>

DESCRIPTION

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.

PACKAGE TYPES

PDIP, SOIC

SHIFT

HCS320

LED

PWM

Operating

鈥?/div>

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

HCS320 BLOCK DIAGRAM

Oscillator

RESET circuit

LED

LED driver

Controller

Power

latching

and

switching

Other

鈥?/div>

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

EEPROM

Encoder

PWM

32-bit shift register

Typical Applications

The HCS320 is ideal for Remote Keyless Entry (RKE)

applications. These applications include:

鈥?/div>

Automotive RKE systems

Automotive alarm systems

Automotive immobilizers

Gate and garage door openers

Identity tokens

Burglar alarm systems

Button input port

SHIFT S

The HCS320 combines a 32-bit hopping code gener-

ated 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.

漏

2001 Microchip Technology Inc.

DS41097C-page 1

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