|
HCS365 Datasheet, PDF (1/34 Pages) Microchip Technology – KEELOQ Code Hopping Encoder | |||
|
HCS365
KEELOQ® Code Hopping Encoder
FEATURES
Security
⢠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
Operating
⢠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
Other
⢠On-chip EEPROM
⢠On-chip tuned oscillator (±10% over voltage and
temperature)
⢠Button inputs have internal pull-down resistors
⢠LED output
⢠PLL control for ASK and FSK
⢠Low external component count
Typical Applications
The HCS365 is ideal for Remote Keyless Entry (RKE)
applications. These applications include:
⢠Automotive RKE systems
⢠Automotive alarm systems
⢠Automotive immobilizers
⢠Gate and garage door openers
⢠Identity tokens
⢠Burglar alarm systems
PACKAGE TYPES
PDIP, SOIC
S0 1
S1 2
S2 3
S3/SHIFT/
RFEN 4
8 VDD
7 LED
6 DATA
5 Vss
HCS365 BLOCK DIAGRAM
Oscillator
RESET circuit
LED
LED driver
Controller
Power
latching
and
switching
EEPROM
Encoder
DATA
32-bit SHIFT register
VSS
VDD
Button input port
S3/SHIFT S2
RFEN
S1
S0
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
KEELOQ® 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.
© 2002 Microchip Technology Inc.
Preliminary
DS41109D-page 1
|
▷ |