HCS300-IP Microchip Technology, HCS300-IP Datasheet - Page 8

• Manufacturer Part Number: HCS300-IP
• Description: KEE LOQ Code Hopping Encoder
• Manufacturer: Microchip Technology

HCS300
FIGURE 4-1:
FIGURE 4-2:
FIGURE 4-3:
FIGURE 4-4:
DS21137D-page 8
PWM
S2(S3)
S[1:0]
Reserved
Repeat Status
16
VLOW and
of Status
(2 bits)
2 bits
CODE WORD TRANSMISSION FORMAT
CODE WORD ORGANIZATION
SYNCHRONOUS TRANSMISSION MODE
TRANSMISSION WORD FORMAT DURING SYNCHRONOUS TRANSMISSION MODE
Preamble
Padding
+
Fixed Code Data
2
T
Status
Period
Button
(4 bits)
P
Bit
Serial Number and Button
“01,10,11”
Button
Code
Status (32 bits)
4
t = 50 ms
28-bit Serial Number
LOGIC ‘0’
LOGIC ‘1’
Header
T
H
Serial Number
Preliminary
Encrypted Portion
of Transmission
28
+
T
(4 bits)
Button
Status
HOP
Overflow
(2 bits)
Encrypted Code Data
bits
B
32 bits of Encrypted Data
LOCK
Encrypted using
Fixed Portion of
Transmission
Discrimination
C
IPHER
(10 bits)
Data Word
T
FIX
bits
16
Algorithm
Transmission Direction
1996 Microchip Technology Inc.
Transmission Direction
Guard
Sync Value
Time
Sync Counter
T
16-bit
G
16