Microchip HCS201 Handleiding

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KEELOQ®HCS1XX/2XX/3XX

Encoder Family

The KEELOQ®family of encoders offers a complete range

of products for Remote Control and secure Remote

Keyless Entry (RKE) Applications. The encoders range

from the HCS101, a fixed code encoder designed for

remote control systems to the HCS2XX and HCS3XX

products, which utilize Microchip’s patented KEELOQ

hopping technology. The devices incorporates a small

package outline, low cost and the minimum external

components to make these device suited for unidirectional

remote keyless entry, remote control and access control

systems. The Code Hopping Encoders combine a 32-bit

hopping code generated by a non-linear encryption

algorithm, with a 32-bit serial number and information bits

to create a transmission stream of up to 69 bits. 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 schemes useless.

Security Features:

•Up to 2 programmable 32-bit serial numbers

•Up to2 programmable 64-bit encoder keys

•Up to 2 programmable 60-bit seed values

•Each transmission is unique

•Up to 69-bit transmission code length

•32-bit hopping code

•Encoder keys are read protected

Operating Features:

•2.0 – 13.3V operation

•Up to six button inputs

•15 functions available

•Up to four selectable baud rates

•Selectable minimum code word completion

•Battery low signal transmitted to receiver

•Nonvolatile synchronization data

•PWM, VPWM, PPM and Manchester modulation

•Button queue information transmitted

•Dual Encoder functionality

Other Features:

•On-chip EEPROM

•On-chip tuned oscillator (±10%)

•Button inputs have internal pull-down resistors

•LED output

•PLL control for ASK and FSK

•Low external component count

Typical Applications:

•Automotive RKE systems

•Automotive alarm systems

•Automotive immobilizers

•Gate and garage door openers

•Identity tokens

•Burglar alarm systems

Related Application Notes:

•AN217 – KEELOQHCS30X, HCS200 Stand-Alone

Programmer

•AN645 – PIC16C57 -Based Code Hopping

Security System

•AN661 – Code Hopping Decoder using PIC16C56

•AN662 – Code Hopping Decoder using Secure

Learn

•AN663 – Simple Code Hopping Decoder

•AN665 – Using KEELOQto Generate Hopping

Passwords

•AN672 – PICmicro® Mid-range MCU Code

Hopping Decoder

•AN740 – Decoding the HCS101 for Non-Secure

Applications

•AN742 – Modular PICmicro Mid-Range Code

Hopping Decoder

•AN744 – Modular Mid-Range PICmicro KEELOQ

Decoder in C

•TB001 – Secure Learning RKE Systems using

KEELOQEncoders

•TB003 – An Introduction to KEELOQCode Hopping

•TB021 – A Guide to Designing for EuroHomelink

Compatibility

•TB042 – Interfacing a KEELOQEncoder to a PLL

Circuit

•TB043 – KEELOQCRC Verification Routines

Product specificaties