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HCS200 数据表(PDF) 8 Page - Microchip Technology

部件名 HCS200
功能描述  KEELOQ짰 Code Hopping Encoder 32-bit hopping code
PDF  34 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

HCS200 数据表(HTML) 8 Page - Microchip Technology

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HCS200
DS40138D-page 8
© 2011 Microchip Technology Inc.
FIGURE 4-1:
CODE WORD FORMAT
FIGURE 4-2:
CODE WORD ORGANIZATION
FIGURE 4-3:
SYNCHRONOUS TRANSMISSION MODE
FIGURE 4-4:
CODE WORD ORGANIZATION (SYNCHRONOUS TRANSMISSION MODE)
LOGIC ‘0’
LOGIC ‘1’
Bit
Period
Preamble
Header
Encrypted Portion
of Transmission
Fixed Portion of
Transmission
Guard
Time
TP
TH
THOP
TFIX
TG
TE
TE
TE
50% Duty Cycle
Fixed
(1-bit)
VLOW
(1-bit)
Button
Status
S2 S1 S0 S3
Serial Number
(28 bits)
Button
Status
S2 S1 S0 S3
Discrimination
bits
(12 bits)
Sync Counter
(16 bits)
Fixed
(1-bit)
VLOW
(1-bit)
Button
Status
1 1 1 1
Serial Number
(28 bits)
SEED
(32 bits)
34 bits of Fixed Portion
32 bits of Encrypted Portion
66 Data bits
Transmitted
LSb first.
LSb
MSb
MSb
LSb
SEED replaces Encrypted Portion when all button inputs are activated at the same time.
“01,10,11”
PWM
S2
S[1:0]
TPS TPH1 TPH2
t = 50 ms
Preamble
Header
Data
Reserved
(16 bits)
Padding
(2 bits)
Button
Status
S2 S1 S0 S3
Serial Number
(28 bits)
Button
Status
S2 S1 S0 S3
Discrimina-
tion bits
(12 bits)
Sync Counter
(16 bits)
82 Data bits
Transmitted
LSb first.
LSb
MSb
Fixed Portion
Encrypted Portion



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