HCS200
K
EE
L
OQ®
Code Hopping Encoder
FEATURES
Security
•
•
•
•
•
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Programmable 28-bit serial number
Programmable 64-bit crypt key
Each transmission is unique
66-bit transmission code length
32-bit hopping code
28-bit serial number, 4-bit button status,
low battery indicator transmitted
• Crypt keys are read protected
DESCRIPTION
The HCS200 from Microchip Technology Inc. is a code
hopping encoder designed primarily for Remote Key-
less Entry (RKE) systems. The device utilizes the
K
EE
L
OQ®
code hopping technology, incorporating high
security, a small package outline and low cost. The
HCS200 is a perfect replacement of fixed code devices
in unidirectional remote keyless entry systems and
access control systems.
PACKAGE TYPES
PDIP, SOIC
S0
S1
S2
NC
1
HCS200
2
3
4
8
7
6
5
V
DD
NC
PWM
V
SS
Operating
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•
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3.5–13.0V operation
Three button inputs - seven functions available
Selectable baud rate
Automatic code word completion
Low battery signal transmitted to receiver
Non-volatile synchronization data
Other
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•
•
•
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Easy to use programming interface
On-chip EEPROM
On-chip oscillator and timing components
Button inputs have internal pull-down resistors
Low external component cost
BLOCK DIAGRAM
Oscillator
RESET circuit
Controller
Power
latching
and
switching
Typical Applications
The HCS200 is ideal for Remote Keyless Entry (RKE)
applications. These applications include:
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•
•
•
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•
Fixed code replacement
Automotive RKE systems
Automotive alarm systems
Automotive immobilizers
Gate and garage door openers
Identity tokens
Burglar alarm systems
PWM
EEPROM
Encoder
32-bit shift register
Vss
V
DD
Button input port
S2 S1 S0
The HCS200 operates over a wide voltage range of
3.5 volts to 13.0 volts and has three button inputs in an
8-pin configuration. This allows the system designer
the freedom to implement up to seven functions. The
only components required for device operation are the
buttons and RF circuitry, allowing a very low
system cost.
©
2011 Microchip Technology Inc.
DS40138D-page 1
MICROCHIP [ MICROCHIP TECHNOLOGY ]
