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HCS370T-ST(2002) 데이터 시트보기 (PDF) - Microchip Technology
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HCS370T-ST
(Rev.:2002)
KEELOQ® Code Hopping Encoder
Microchip Technology
HCS370T-ST Datasheet PDF : 36 Pages
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HCS370
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
B0
B1
Perform Function
5
Indicated by
button press
3
K
EE
L
OQ
Decryption
Algorithm
Decrypted
Synchronization
Counter
Serial Number
Sync Counter
Crypt Key
4
Verify
Counter
NOTE:
Circled numbers indicate the order of execution.
DS41111D-page 4
Preliminary
2002 Microchip Technology Inc.
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