|
HCS362-I Datasheet, PDF (1/38 Pages) Microchip Technology – KEELOQ Code Hopping Encoder | |||
|
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 â 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 â 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 (+/â10% 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
© 2002 Microchip Technology Inc.
Preliminary
DS40189D-page 1
|
▷ |