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HCS365T Datasheet

  • HCS365T

  • KEELOQ Code Hopping Encoder

  • 442.14KB

  • 34頁

  • MICROCHIP   MICROCHIP

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HCS365
K
EE
L
OQ廬
Code Hopping Encoder
FEATURES
Security
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Two programmable 32-bit serial numbers
Two programmable 64-bit crypt keys
Two programmable 60-bit seed values
Each transmission is unique
67/69-bit transmission code length
32-bit hopping code
Crypt keys are read protected
PACKAGE TYPES
PDIP, SOIC
S0
S1
S2
S3/SHIFT/
RFEN
1
8
V
DD
LED
DATA
Vss
HCS365
2
3
4
7
6
5
Operating
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2.05-5.5V operation
Four button inputs
15 functions available
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
HCS365 BLOCK DIAGRAM
Oscillator
RESET circuit
LED
LED driver
Controller
Power
latching
and
switching
EEPROM
Encoder
DATA
32-bit SHIFT register
V
SS
V
DD
S3/SHIFT S2 S
1
S
0
RFEN
Button input port
Other
鈥?On-chip EEPROM
鈥?On-chip tuned oscillator (鹵10% over voltage and
temperature)
鈥?Button inputs have internal pull-down resistors
鈥?LED output
鈥?PLL control for ASK and FSK
鈥?Low external component count
GENERAL DESCRIPTION
The HCS365 is a code hopping encoder designed for
secure Remote Keyless Entry (RKE) and secure
remote control systems. The HCS365 utilizes the
K
EE
L
OQ 廬
code hopping technology, which incorpo-
rates high security, a small package outline, and low
cost to make this device a perfect solution for unidirec-
tional authentication systems and access control sys-
tems.
The HCS365 combines a hopping code generated by a
nonlinear encryption algorithm, a serial number, and
status bits to create a secure transmission code. The
length of the transmission eliminates the threat of code
scanning and code grabbing access techniques.
Typical Applications
The HCS365 is ideal for Remote Keyless Entry (RKE)
applications. These applications include:
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Automotive RKE systems
Automotive alarm systems
Automotive immobilizers
Gate and garage door openers
Identity tokens
Burglar alarm systems
漏
2002 Microchip Technology Inc.
Preliminary
DS41109D-page 1

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