HCS200/P Microchip Technology, HCS200/P Datasheet - Page 8

• Manufacturer Part Number: HCS200/P
• Description: IC,Remote-Control Transmitter/Encoder,CMOS,DIP,8PIN
• Manufacturer: Microchip Technology
• Type: Code Hopping Encoderr

Specifications of HCS200/P

• Applications: Remote Secure Access, Keyless Entry
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

HCS200
FIGURE 4-1:
FIGURE 4-2:
FIGURE 4-3:
FIGURE 4-4:
DS40138C-page 8
MSb
MSb
MSb
PWM
S2
S[1:0]
Reserved
(16 bits)
(1-bit)
(1-bit)
Fixed
Fixed
T
PS
(1-bit)
(1-bit)
V
V
SEED replaces Encrypted Portion when all button inputs are activated at the same time.
50% Duty Cycle
LOW
LOW
T
PH
Preamble
Padding
(2 bits)
T
E
1 T
CODE WORD FORMAT
CODE WORD ORGANIZATION
SYNCHRONOUS TRANSMISSION MODE
CODE WORD ORGANIZATION (SYNCHRONOUS TRANSMISSION MODE)
34 bits of Fixed Portion
T
Period
S2 S1 S0 S3
P
T
1 1 1 1
Bit
PH
E
“01,10,11”
Button
Button
Status
Status
2
T
E
S2 S1 S0 S3
Fixed Portion
Button
Status
LOGIC ‘0’
LOGIC ‘1’
t = 50 ms
Header
T
Serial Number
Serial Number
H
(28 bits)
(28 bits)
Serial Number
Encrypted Portion
(28 bits)
of Transmission
T
HOP
S2 S1 S0 S3
Preamble
Button
Status
S2 S1 S0 S3
32 bits of Encrypted Portion
Button
Status
Fixed Portion of
Transmission
Discrimination
(12 bits)
T
Header
(32 bits)
bits
FIX
SEED
Encrypted Portion
Discrimina-
(12 bits)
tion bits
2002 Microchip Technology Inc.
82 Data bits
Transmitted
66 Data bits
Transmitted
LSb first.
LSb first.
Sync Counter
Guard
Time
(16 bits)
T
Sync Counter
G
(16 bits)
Data
LSb
LSb
LSb