參數(shù)資料
型號(hào)： HCS361-ISN
廠商： Microchip Technology Inc.
英文描述： IC CONV AC/DC -12V 90MA SIP9
中文描述： 而Keeloq跳碼編碼器
文件頁(yè)數(shù)： 14/24頁(yè)
文件大?。?/td> 343K
代理商： HCS361-ISN
HCS361
DS40146C-page 14
Preliminary
1996 Microchip Technology Inc.
7.0
INTEGRATING THE HCS361
INTO A SYSTEM
Use of the HCS361 in a system requires a compatible
decoder. This decoder is typically a microcontroller with
compatible firmware. Firmware routines that accept
transmissions from the HCS361 and decrypt the
hopping code portion of the data stream are available.
These routines provide system designers the means to
develop their own decoding system.
7.1
Learning a Transmitter to a Receiver
In order for a transmitter to be used with a decoder, the
transmitter must first be ‘learned’. Several learning
strategies can be followed in the decoder implementa-
tion. When a transmitter is learned to a decoder, it is
suggested that the decoder stores the serial number
and current synchronization value in EEPROM. The
decoder must keep track of these values for every
transmitter that is learned (Figure 7-1). The maximum
number of transmitters that can be learned is only a
function of how much EEPROM memory storage is
available. The decoder must also store the manufac-
turer’s code in order to learn a transmission transmitter,
although this value will not change in a typical system
so it is usually stored as part of the microcontroller
ROM code. Storing the manufacturer’s code as part of
the ROM code is also better for security reasons.
It must be stated that some learning strategies have
been patented and care must be taken not to infringe.
FIGURE 7-1:
TYPICAL LEARN SEQUENCE
Enter Learn
Mode
Wait for Reception
of a Valid Code
Generate Key
from Serial Number
Use Generated Key
to Decrypt
Compare Discrimination
Value with Fixed Value
Equal
Wait for Reception
of Second Valid Code
Compare Discrimination
Value with Fixed Value
Use Generated Key
to Decrypt
Equal
Counters
Sequential
Encryption key
Synchronization counter
Serial number
Exit
Learn successful Store:
Learn
Unsuccessful
No
No
No
Yes
Yes
Yes
相關(guān)PDF資料
PDF描述
HCS361-P IC CONV AC/DC -5V 100MA SIP9
HCS361-SN IC AC/DC CONV 12V 350MA SIP12
HCS365 KEELOQ Code Hopping Encoder
HCS365T KEELOQ Code Hopping Encoder
HCS370 KEELOQ Code Hopping Encoder
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HCS361-P 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ CODE HOPPING ENCODER
HCS361-SN 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ CODE HOPPING ENCODER
HCS361T/SN 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 2-6.6V 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
HCS361T-I/SN 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 2-6.6V 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
HCS362 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Memory Programming Specification
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