HCS512 Datasheet_PDF文件下载_芯片资料查询

Secure storage of Manufacturer鈥檚 Code

Secure storage of transmitter鈥檚 keys

Up to four transmitters can be learned

K

EE

L

OQ

code hopping technology

Normal and secure learning mechanisms

PDIP, SOIC

LRNIN

LRNOUT

NC

MCLR

GND

S0

S1

S2

S3

1

2

3

4

5

6

7

8

9

HCS512

Code Hopping Decoder

PACKAGE TYPE

18

17

16

15

14

13

12

11

10

HCS512

RFIN

NC

OSCIN

OSC

OUT

V

DD

DATA

CLK

SLEEP

V

LOW

Operating

鈥?/div>

3.0V 鈥?6.0V operation

4 MHz RC oscillator

Learning indication on LRNOUT

Auto baud rate detection

Power saving sleep mode

Other

鈥?/div>

Stand alone decoder

On-chip EEPROM for transmitter storage

Four binary function outputs鈥?5 functions

18-pin DIP/SOIC package

BLOCK DIAGRAM

RFIN

67-Bit Reception Register

Typical Applications

鈥?/div>

Automotive remote entry systems

Automotive alarm systems

Automotive immobilizers

Gate and garage openers

Electronic door locks

Identity tokens

Burglar alarm systems

EEPROM

CONTROL

DECRYPTOR

DATA

CLK

LRNIN

SEL

MCLR

SLEEP

CONTROL

S3

V

LOW

LRNOUT

OSCIN OSCILLATOR

OUTPUT

S0

S1

S2

Compatible Encoders

鈥?HCS200, HCS300, HCS301, HCS360, HCS361

鈥?NTQ106

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 K

EE

L

OQ

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.

The Manufacturer鈥檚 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鈥檚 Code which cannot be read

out of the device.

The HCS512 operates over a wide voltage range of

3.0 volts to 6.0 volts. The decoder employs automatic

baud 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.

漏

1997 Microchip Technology Inc.

DS40151C-page 1

型号

版本

描述

厂商

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