HCS410_01 Datasheet, PDF (1/36 Pages) Microchip Technology – KEELOQ® Code Hopping Encoder and Transponder

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]—seven 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.
 2001 Microchip Technology Inc.
Preliminary
DS40158E-page 1