HCS360
®
KEELOQ Code Hopping Encoder
FEATURES
PACKAGE TYPES
PDIP, SOIC
Security
8
7
6
5
VDD
LED
PWM
VSS
S0
1
2
3
4
• 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 fixed code (28/32-bit serial number,
4/0-bit function code, 1-bit status, 2-bit CRC)
• Encryption keys are read protected
S1
S2
S3
Operating
• 2.0-6.6V operation
• Four button inputs
HCS360 BLOCK DIAGRAM
Oscillator
Power
latching
and
- 15 functions available
• Selectable baud rate
• Automatic code word completion
• Battery low signal transmitted to receiver
• Nonvolatile synchronization data
• PWM and Manchester modulation
Controller
Reset circuit
switching
LED
LED driver
EEPROM
Encoder
Other
PWM
• Easy to use programming interface
• On-chip EEPROM
32-bit shift register
• On-chip oscillator and timing components
• Button inputs have internal pull-down resistors
• Current limiting on LED output
• Minimum component count
VSS
Button input port
VDD
Enhanced Features Over HCS300
S2
S3
S1 S0
• 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 Manchester modulation
• IR modulation mode
DESCRIPTION
The HCS360 is a code hopping encoder designed for
secure Remote Keyless Entry (RKE) systems. The
HCS360 utilizes the KEELOQ 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 sys-
tems and access control systems.
Typical Applications
The HCS360 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
The HCS360 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.
• Burglar alarm systems
KEELOQ is a registered trademark of Microchip Technology, Inc.
Microchip’s Secure Data Products are covered by some or all of the following patents:
Code hopping encoder patents issued in Europe, U.S.A., and R.S.A. — U.S.A.: 5,517,187; Europe: 0459781; R.S.A.: ZA93/4726
Secure learning patents issued in the U.S.A. and R.S.A. — U.S.A.: 5,686,904; R.S.A.: 95/5429
2001 Microchip Technology Inc.
DS40152D-page 1