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HCS301SN Просмотр технического описания (PDF) - Microchip Technology
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HCS301SN
KEELOQ® Code Hopping Encoder
Microchip Technology
HCS301SN Datasheet PDF : 38 Pages
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HCS301
FIGURE 1-2:
BUILDING THE TRANSMITTED CODE WORD (ENCODER)
EEPROM Array
Crypt Key
Sync Counter
Serial Number
K
EE
L
OQ®
Encryption
Algorithm
Button Press
Information
Serial Number
32 Bits
Encrypted Data
Transmitted Information
FIGURE 1-3:
BASIC OPERATION OF RECEIVER (DECODER)
1 Received Information
Button Press
Information
Serial Number
32 Bits of
Encrypted Data
EEPROM Array
Manufacturer Code
2
Check for
Match
Perform Function
5
Indicated by
button press
3
K
EE
L
OQ®
Decryption
Algorithm
Decrypted
Synchronization
Counter
Serial Number
Sync Counter
Crypt Key
4
Check for
Match
NOTE:
Circled numbers indicate the order of execution.
DS21143C-page 4
©
2011 Microchip Technology Inc.
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