參數(shù)資料
型號： HCS412TSN
廠商： Microchip Technology Inc.
英文描述： KEELOQ Code Hopping Encoder and Transponder
中文描述： 而Keeloq跳碼編碼器和轉(zhuǎn)發(fā)器
文件頁數(shù)： 10/44頁
文件大小： 704K
代理商： HCS412TSN
HCS412
DS41099C-page 10
Preliminary
2002 Microchip Technology Inc.
FIGURE 3-2:
CODE WORD ORGANIZATION
3.2.1
QUEUE COUNTER (QUE)
The QUE counter can be used to request secondary
decoder functions using only a single transmitter but-
ton. Typically a decoder must keep track of incoming
transmissions to determine when a double button press
occurs, perhaps an unlock all doors request. The QUE
counter removes this burden from the decoder by
counting multiple button presses.
The 2-bit QUE counter is incremented each time an
active button input is released for at least the
Debounce Time (T
DBR
), then reactivated (button
pressed again) within the Queue Time (T
QUE
). The
FIGURE 3-3:
QUE COUNTER TIMING DIAGRAM
counter increments up from 0 to a maximum of 3,
returning to 0 only after a different button activation or
after button activations spaced greater than the Queue
Time (T
QUE
) apart.
The current transmission aborts, after completing the
minimum number of code words (Section 3.4.1), when
the active button input is released. A button re-activa-
tion within Queue Time (T
QUE
) then initiates a new
transmission (new synchronization counter, encrypted
data) using the updated QUE value.
Figure 3-3 shows the timing diagram to increment the
queue counter value.
V
LOW
1-Bit
Fixed Code Portion (37 Bits)
QUE
2 Bits
CRC
2 Bits
V
LOW
1-Bit
SER 1
Most Sig 16 Bits
SER 0
Least Sig 16 Bits
BUT
4 Bits
Counter
Overflow
2 Bits
DISCRIM
10 Bits
Synchronization
Counter
16 Bits
15
0
S2
S1
S0 LC0
OVR1
OVR0
Hopping Code Portion Message (32 Bits)
Q1 Q0 C1 C0
MSb
LSb
69 Data bits
Transmitted LSb first.
32-bit Serial Number (XSER = 1)
Fixed Code Portion (37 Bits)
QUE
2 Bits
CRC
2 Bits
BUT
4 Bits
S2
S1
S0 LC0
SER 0
Least Sig16 Bits
BUT
4 Bits
Counter
Overflow
2 Bits
DISCRIM
10 Bits
Synchronization
Counter
16 Bits
15
0
S2
S1
S0 LC0
OVR1
OVR0
Hopping Code Portion Message (32 Bits)
Q1 Q0 C1 C0
MSb
LSb
69 Data bits
Transmitted LSb first.
SER 1
12 MSb’s
28-bit Serial Number (XSER = 0)
Shaded data included in CRC calculation
Input
Sx
Code Words
Transmitted
1st Button Press
All Buttons Released
2nd Button Press
QUE1:0 = 00
2
Synch CNT = X
QUE1:0 = 01
2
Synch CNT = X+1
t
2
= 0
t
1
> T
DBP
t
1
= 0
T
DBR
< t < T
QUE
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HCS473 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Code Hopping Encoder and Transponder
HCS473/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
HCS473/SL 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
HCS473_13 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ?? 3-Axis Transcoder
HCS473-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
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