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| 型号： | DM303006 |
| 厂商： | Microchip Technology |
| 文件页数： | 17/48页 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION KEELOQ |
| 标准包装： | 1 |
| 系列： | KEELOQ® |
| 类型： | KeeLoq? |
| 适用于相关产品： | Keeloq 编码器和解码器 |
| 已供物品： | 3 个板，CD，产品样品 |
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M
K EE L OQ ? EVALUATION KIT
II USER ’ S GUIDE
K EE L OQ ? Encoders
5.0
GENERAL DESCRIPTION
Minimal external components are required to imple-
ment a complete remote transmitter. All input pull down
Microchip K EE L OQ Code Hopping encoders are
intended for secure authentication and remote control
applications.
The encoders contain internal non-volatile memory
(EEPROM) for data and configuration storage. They
will retain information for several years, even when
stored without power supply.
resistors, oscillator circuit components, voltage regula-
tion, LED driving, voltage sensing and button debounc-
ing circuits are integrated in the K EE L OQ encoder
silicon.
FIGURE 5-1:
TYPICAL K EE L OQ TRANSMITTER
3 to 12V
S0
S1
HCS3XX
V DD
LED
battery*
S2
DATA
S3
( *Note: depending on actual encoder model)
V SS
RF Circuitry
In addition to the IC, all that is required is a circuit for
transmitting the information over the desired media
(e.g., a UHF radio transmitter), a battery, and a button
5.1
5.1.1
Encoder Features
ENCODER SYNCHRONIZATION
switch as shown in Figure 5-1. A single encoder can
command a multifunction decoder to activate up to 15
specific functions/outputs. The user would select the
desired function pressing one or more buttons on the
transmitter.
For a complete list of all the features of the various
K EE L OQ encoders and a description of their features,
consult the related data sheets included in the
CD ROM or download them from the Microchip web
site: http:\\www.microchip.com.
A brief summary of basic encoder features is given in
Table 5-1.
? 2001 Microchip Technology Inc.
Every K EE L OQ encoder has at least a 16-bit synchroni-
zation counter that is incremented each time the
encoder is activated. The counter is encrypted and
transmitted as part of a code hopping transmission.
When decoder learns a transmitter, the encoder ’ s
received serial number, calculated encryption key and
decrypted synchronization information are stored in
EEPROM. It is then very easy for a decoder to check
whether a given transmission is a valid transmission or
a transmission re-transmitted by a code grabber. The
received counter value must be greater than the stored
synchronization counter value for a transmission to be
valid.
DS41155A-page 15
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相关代理商/技术参数 |
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|---|---|
| DM303007 | 功能描述:开发板和工具包 - PIC / DSPIC KEELOQ 3 Development Kit RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM303007 | 制造商:Microchip Technology Inc 功能描述:KeeLoq 3 Development Kit |
| DM303008 | 功能描述:开发板和工具包 - 无线 Keeloq 3 Dev Kit (with PICkit 3) RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| DM3030-W2455AET/LF | 制造商:Advanced Ceramic X Corporation 功能描述:ADODM3030-W2455AET/LF DIPLEXER MODULE, 2 |
| DM3030-W2455BET | 制造商:Advanced Ceramic X Corporation 功能描述:DIPLEXER MODULE, 2400-5500MHZ |
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