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HCS410_11 Datasheet, PDF (1/46 Pages) Microchip Technology – KEELOQ® Code Hopping Encoder and Transponder 2-bit CRC, 2-bit queue | |||
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HCS410
KEELOQ® Code Hopping Encoder and Transponder
FEATURES
Security
⢠Two programmable 64-bit encoder keys
⢠16/32-bit bi-directional challenge and response
using one of two keys
⢠69-bit transmission length
⢠32-bit unidirectional code hopping, 37-bit non-
encrypted portion
⢠Encoder keys are read protected
⢠Programmable 28/32-bit serial number
⢠60/64-bit, read-protected seed for secure learning
⢠Three IFF encryption algorithms
⢠Delayed increment mechanism
⢠Asynchronous transponder communication
⢠Queuing information transmitted
Operating
⢠2.0V - 6.6V operation, 13V encoder only
operation
⢠Three switch inputs [S2, S1, S0]âseven functions
⢠Batteryless bi-directional transponder
⢠Selectable baud rate and code word blanking
⢠Automatic code word completion
⢠Battery low signal transmitted
⢠Non-volatile synchronization
⢠PWM or Manchester RF encoding
⢠Combined transmitter, transponder operation
⢠Anti-collision of multiple transponders
⢠Passive proximity activation
⢠Device protected against reverse battery
⢠Intelligent damping for high Q LC-circuits
Other
⢠37-bit nonencrypted part contains 28/32-bit serial
number, 4/0-bit function code, 1-bit battery low,
2-bit CRC, 2-bit queue
⢠Simple programming interface
⢠On-chip tunable RC oscillator (±10%)
⢠On-chip EEPROM
⢠64-bit user EEPROM in transponder mode
⢠Battery-low LED indication
⢠SQTP serialization quick-time programming
⢠8-pin PDIP/SOIC/TSSOP and die
PACKAGE TYPES
PDIP, SOIC
S0 1
S1 2
S2/LED 3
LC1 4
8 VDD
7 LC0
6 PWM
5 GND
TSSOP S2/LED 1
LC1 2
GND 3
PWM 4
8 S1
7 S0
6 VDD
5 LC0
BLOCK DIAGRAM
VDD
Power
Control
Oscillator
Configuration Register
S0
S1
Debounce
Wake-up Control
Logic
and
Address
Decoding
EEPROM
Queuer
S2
LED
Control
LCI0
LCI1
PWM
PWM
Driver
PPM
Detector
PWM
PPM
Manch.
Encoder
Typical Applications
⢠Automotive remote entry systems
⢠Automotive alarm systems
⢠Automotive immobilizers
⢠Gate and garage openers
⢠Electronic door locks (Home/Office/Hotel)
⢠Burglar alarm systems
⢠Proximity access control
*Secure Learn patent pending.
© 2011 Microchip Technology Inc.
DS40158F-page 1
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