HCS361 Datasheet_PDF文件下载_芯片资料查询

Programmable 28/32-bit serial number

Programmable 64-bit encryption key

Each transmission is unique

67-bit transmission code length

32-bit hopping code

35-bit 铿亁ed code (28/32-bit serial number,

4/0-bit function code, 1-bit status, 2-bit CRC)

鈥?Encryption keys are read protected

HCS361

Code Hopping Encoder*

PACKAGE TYPES

PDIP, SOIC

S0

S1

S2

S3

1

HCS361

2

3

4

8

7

6

5

V

DD

LED

PWM

V

SS

Operating

鈥?2.0-6.6V operation

鈥?Four button inputs

- 15 functions available

鈥?Selectable baud rate

鈥?Automatic code word completion

鈥?Battery low signal transmitted to receiver

鈥?Nonvolatile synchronization data

鈥?PWM and VPWM modulation

HCS361 BLOCK DIAGRAM

Oscillator

Reset circuit

LED

LED driver

Controller

Power

latching

and

switching

EEPROM

Encoder

Other

鈥?/div>

Easy to use programming interface

On-chip EEPROM

On-chip oscillator and timing components

Button inputs have internal pulldown resistors

Current limiting on LED output

Minimum component count

PWM

32-bit shift register

V

SS

V

DD

Button input port

Enhanced Features Over HCS300

鈥?/div>

48-bit seed vs. 32-bit seed

2-bit CRC for error detection

28/32-bit serial number select

Two seed transmission methods

PWM and VPWM modulation

Wake-up signal in VPWM mode

IR modulation mode

S

3

S

2

S

1

S

0

DESCRIPTION

The HCS361 is a code hopping encoder designed for

secure Remote Keyless Entry (RKE) systems. The

HCS361 utilizes the K

EE

L

OQ

code hopping technology,

which incorporates high security, a small package

outline and low cost, to make this device a perfect

solution for unidirectional remote keyless entry systems

and access control systems.

The HCS361 combines a 32-bit hopping code

generated by a nonlinear encryption algorithm, with a

28/32-bit serial number and 7/3 status bits to create a

67-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 grabbing) schemes useless.

Typical Applications

The HCS361 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

K

EE

L

OQ

is a trademark of Microchip Technology Inc.

*Code hopping encoder patents issued in Europe, U. S. A., R. S. A. 鈥?US: 5,517,187; Europe: 0459781

漏

1996 Microchip Technology Inc.

Preliminary

DS40146C-page 1

型号

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