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參數(shù)資料
| 型號： | HCS201 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | KEELOQ Code Hopping Encoder |
| 中文描述： | 而Keeloq跳碼編碼器 |
| 文件頁數(shù)： | 9/28頁 |
| 文件大?。?/td> | 383K |
| 代理商： | HCS201 |
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2001 Microchip Technology Inc.
DS41098C-page 9
HCS201
4.0
TRANSMITTED WORD
4.1
Code Word Format
The HCS201 code word is made up of several parts
(Figure 4-1). Each code word contains a 50% duty
cycle preamble, a header, 32 bits of encrypted data and
34 bits of fixed data followed by a guard period before
another code word can begin. Refer to Table 8-4 for
code word timing.
4.2
Code Word Organization
The HCS201 transmits a 66-bit code word when a
button is pressed. The 66-bit word is constructed from
a Fixed Code portion and an Encrypted Code portion
(Figure 4-2).
The 32 bits of
Encrypted Data
are generated from 4
button bits, 12 discrimination bits and the 16-bit sync
value. The encrypted portion alone provides up to four
billion changing code combinations.
The 34 bits of
Fixed Code Data
are made up of 2 sta-
tus bits, 4 button bits and the 28-bit serial number. The
fixed and encrypted sections combined increase the
number of code combinations to 7.38 x 10
19
.
FIGURE 4-1:
CODE WORD FORMAT
FIGURE 4-2:
CODE WORD ORGANIZATION
LOGIC ‘0’
LOGIC ‘1’
Bit
Period
Preamble
T
P
Header
T
H
Encrypted Portion
of Transmission
T
HOP
Fixed Portion of
Transmission
T
FIX
Guard
Time
T
G
T
E
T
E
T
E
50% Duty Cycle
1
V
LOW
(1 bit)
Button
Status
S2 S1 S0 S3
Serial Number
(28 bits)
Button
Status
S2 S1 S0 S3
DISC
(12 bits)
Sync Counter
(16 bits)
1
V
LOW
(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.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| HCS2-01 | 制造商:Richco 功能描述:HINGED CABLE SADDLE,NAT,16MM CBL |
| HCS201/P | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3.5-13V RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| HCS201/SN | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3.5-13V RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| HCS201_11 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ? Code Hopping Encoder 34-bit fixed code (28-bit serial number |
| HCS201-I/P | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3.5-13V RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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