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RFHCS362AF Datasheet(PDF) 6 Page - Microchip Technology

Part # RFHCS362AF
Description  Code Hopping Encoder with UHF ASK/FSK Transmitter
PDF  60 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

RFHCS362AF Datasheet(HTML) 6 Page - Microchip Technology

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rfHCS362G/362F
DS41189A-page 6
Preliminary
© 2002 Microchip Technology Inc.
FIGURE 1-3:
BUILDING THE TRANSMITTED CODE WORD (ENCODER)
FIGURE 1-4:
BASIC OPERATION OF RECEIVER (DECODER)
NOTE: Circled numbers indicate the order of execution.
Button Press
Information
EEPROM Array
32 Bits
Encrypted Data
Serial Number
Transmitted Information
Encryption Key
Sync Counter
Serial Number
KEELOQ
Encryption
Algorithm
Button Press
Information
EEPROM Array
Manufacturer Code
32 Bits of
Encrypted Data
Serial Number
Received Information
Decrypted
Synchronization
Counter
Check for
Match
Sync Counter
Serial Number
KEELOQ
Decryption
Algorithm
1
3
4
Check for
Match
2
Perform Function
Indicated by
button press
5
Encryption Key



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