參數(shù)資料
型號： HCS412I
廠商： Microchip Technology Inc.
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： +48V Quad Hot-Swap Controllers For Power-Over-LAN
中文描述： 而Keeloq跳碼編碼器和轉(zhuǎn)發(fā)器
文件頁數(shù)： 9/44頁
文件大?。?/td> 704K
代理商： HCS412I
2002 Microchip Technology Inc.
Preliminary
DS41099C-page 9
HCS412
TABLE 3-1:
ENCODER MODE ACTIVATION
3.2
Transmitted Code Word
The HCS412 transmits a 69-bit code word in response
to a button or proximity activation (Figure 3-1). Each
code word contains a 50% duty cycle preamble,
header, 32 bits of encrypted data and 37 bits of fixed
code data followed by a guard period before another
code word can begin.
The 32 bits of
Encrypted Data
include 4 button bits, 2
counter overflow bits, 10 discrimination bits and the 16-
bit synchronization counter value (Figure 3-2).
The content of the 37 bits of
Fixed Code Data
varies
with the extended serial number (XSER) option
(Figure 3-2).
If the extended serial number option is disabled
(XSER = 0), the 37 bits include 5 status bits, 4
button status bits and the 28-bit serial number.
If the extended serial number option is enabled
(XSER = 1), the 37 bits include 5 status bits and
the 32-bit serial number.
FIGURE 3-1:
CODE WORD FORMAT
4-Bit Button Status
SEED
TMPSD
Resulting Transmission
LC0
(Note 1)
S2
S1
S0
X
X
X
0
0
0
0
1
1
1
0
1
X
X
0
X
X
0
Code hopping transmission
Code hopping transmission
Code hopping transmission
Code hopping code words until time = T
DSD
, then seed code words.
SEED transmissions temporarily enabled until the 7lsb’s of the synchro-
nization counter wrap 7Fh to 00h. Then only code hopping code words.
Code hopping code words until time = T
DSD
, then seed code words.
Code hopping transmission (2 key IFF enabled)
Code hopping transmission
Code hopping transmission
Code hopping transmission
Code hopping transmission
Limited SEED transmissions - temporarily enabled until the 7lsb’s of the
synchronization counter wrap 7Fh to 00h.
SEED transmission
Code hopping transmission (2 key IFF enabled)
Proximity activated code hopping transmission.
0
1
1
1
X
X
X
0
0
1
X
X
X
0
X
X
X
X
1
1
1
1
0
0
1
1
1
0
0
1
0
1
1
1
X
0
1
X
1
0
0
0
Note 1:
The transmitted button status will reflect the state of the LC0 input when the button inputs are sampled.
Preamble
T
P
Header
T
H
Encrypted Portion
of Transmission
T
HOP
Fixed Portion of
Transmission
T
FIX
Guard
Time
T
G
50% Duty Cycle
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HCS412-I/P 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 w/ Passive Entry 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
HCS412-I/SN 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 w/ Passive Entry 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
HCS412IP 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder and Transponder
HCS412P 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder and Transponder
HCS412SN 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder and Transponder
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