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參數(shù)資料
| 型號(hào)： | HCS412SN |
| 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(yè)數(shù)： | 26/44頁(yè) |
| 文件大?。?/td> | 704K |
| 代理商： | HCS412SN |
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HCS412
DS41099C-page 26
Preliminary
2002 Microchip Technology Inc.
FIGURE 4-11: IFF CHALLENGE AND RESPONSE
4.3.7
CODE HOPPING REQUEST
The command tells the HCS412 to increment the syn-
chronization counter and build the 32-bit code hopping
portion of the code word.
If RF Echo is disabled, the data will be transmitted
on the LC lines only (Figure 4-12).
If RF Echo is enabled, the data will be transmitted
in a code word on the DATA line followed by the
data transmitted on the LC lines. The DATA line is
transmitted first for passive entry support
(Figure 4-13).
The data format will be the same as described in
Section 3.2.
TABLE 4-8:
REQUEST HOPPING CODE COMMANDS
FIGURE 4-12: CODE HOPPING REQUEST (RF ECHO DISABLED)
FIGURE 4-13: CODE HOPPING REQUEST (RF ECHO ENABLED)
32-bit
Challenge
32-bit
Response
Command
T
IT
ACK
b
b
b
0
1
T
OTD
T
PU
T
ATO
Start
2 LF
TE
Start
2 LF
TE
0 1
01b Preamble
Communication from reader to HCS412
Communication from HCS412 to reader
Activate
Field
ACK
Delay to
Command
Command
Delay to
Data
32-bit Challenge
Delay before
Response
32-bit
Response
L
M
L
M
L
M
Start
1 LF
TE
Command
Description
Expected data In
Response
11000
Request Hopping Code transmission
None
32-Bit Hopping Code
T
OTH
32-Bit PPM
Response
Command
Start
2 LF
TE
T
PU
Communication from reader to HCS412
Communication from HCS412 to reader
T
ATO
0
0
0
1
1
ACK
Start
1 LF
TE
0 1
01b Preamble
Activate
Field
ACK
Delay to
Command
Command
Delay before
Response
32-bit Response
L
M
L
M
O
(
P
H
F
(
H
(
LF Communication from reader to HCS412
LF Communication from HCS412 to reader
DATA (RF)
Inductive (LF)
L
M
L
M
H
Field
ACK
Field
ACK
32-Bit PPM
Response
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| HCS412T | KEELOQ Code Hopping Encoder and Transponder |
| HCS412TI | KEELOQ Code Hopping Encoder and Transponder |
| HCS412TP | Dual PCI 2.2 Hot-Swap Controllers |
| HCS412 | Code Hopping Encoder and Transponder(編碼器和收發(fā)兩用機(jī)) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HCS412T | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder and Transponder |
| HCS412T/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(shí)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 |
| HCS412TI | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder and Transponder |
| HCS412T-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(shí)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 |
| HCS412TP | 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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