HCS362_11 Datasheet, PDF (1/46 Pages) Microchip Technology – KEELOQ® Code Hopping Encoder Non-volatile synchronization data

HCS362
KEELOQ^® Code Hopping Encoder
FEATURES
Security
• Programmable 28/32-bit serial number
• Two programmable 64-bit encryption keys
• Programmable 60-bit seed
• Each transmission is unique
• 69-bit transmission code length
• 32-bit hopping code
• 37-bit fixed code (28/32-bit serial number,
4/0-bit function code, 1-bit status, 2-bit CRC/time,
2-bit queue)
• Encryption keys are read protected
Operation
• 2.0V – 6.3V operation
• Four button inputs
• 15 functions available
• Selectable baud rates and code word blanking
• Programmable minimum code word completion
• Battery low signal transmitted to receiver with
programmable threshold
• Non-volatile synchronization data
• PWM and Manchester modulation
Other
• RF Enable output – PLL interface
• Easy to use programming interface
• On-chip EEPROM
• On-chip tunable oscillator and timing components
• Button inputs have internal pull-down resistors
• Current limiting on LED output
• Minimum component count
Enhanced Features Over HCS300
• 60-bit seed vs. 32-bit seed
• 2-bit CRC for error detection
• 28/32-bit serial number select
• Tunable oscillator (+/ −10% over specified voltage
ranges)
• Time bits option
• Queue bits
• TSSOP package
• Programmable Time-out and Guard Time
PACKAGE TYPES
PDIP, SOIC
S0 1
S1 2
S2 3
S3/RFEN 4
8 ^VDD
7 ^LED/SHIFT
6 ^DATA
5 ^VSS
TSSOP
S2 1
S3/RFEN 2
VSS 3
DATA ⁴
8 S1
7 S0
6 VDD
5 _LED/SHIFT
HCS362 BLOCK DIAGRAM
Oscillator
RESET Circuit
LED
LED Driver
RFEN
PLL Driver
Controller
Power
Latching
and
Switching
DATA
VSS
VDD
EEPROM
Encoder
32-bit Shift Register
SHIFT
Button Input Port
S3 S2 S1 S0
Typical Applications
The HCS362 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
© 2011 Microchip Technology Inc.
DS40189E-page 1