HCS370/ST Microchip Technology, HCS370/ST Datasheet - Page 4
HCS370/ST
Manufacturer Part Number
HCS370/ST
Description
IC ENCODR CODEHOP KEELOQ 14TSSOP
Manufacturer
Microchip Technology
Type
Code Hopping Encoderr
Specifications of HCS370/ST
Applications
Remote Secure Access, Keyless Entry
Mounting Type
Surface Mount
Package / Case
14-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HCS370/ST
Manufacturer:
MICROCHIP
Quantity:
12 000
HCS370
FIGURE 1-2:
FIGURE 1-3:
NOTE: Circled numbers indicate the order of execution.
DS41111D-page 4
EEPROM Array
Serial Number
Sync Counter
Crypt Key
5
Perform Function
Indicated by
Button Press
button press
Information
BUILDING THE TRANSMITTED CODE WORD (ENCODER)
BASIC OPERATION OF RECEIVER (DECODER)
1
2
Received Information
Serial Number
Check for
Match
Synchronization
Encrypted Data
Decrypted
Preliminary
K
Decryption
Algorithm
32 Bits of
Counter
EE
Encryption
Algorithm
L
K
3
OQ
Button Press
EE
Information
L
OQ
B0
B1
Transmitted Information
Serial Number
Manufacturer Code
4
EEPROM Array
Serial Number
Counter
Verify
Sync Counter
Crypt Key
2002 Microchip Technology Inc.
Encrypted Data
32 Bits