- 您現在的位置：買賣IC網 > PDF目錄98286 > TRC1315DR (TEXAS INSTRUMENTS INC) RF, REMOTE CONTROL SUPPORT CIRCUIT, PDSO14 PDF資料下載
參數資料
| 型號： | TRC1315DR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 搖控器 |
| 英文描述： | RF, REMOTE CONTROL SUPPORT CIRCUIT, PDSO14 |
| 封裝： | PLASTIC, SO-14 |
| 文件頁數： | 27/27頁 |
| 文件大小： | 358K |
| 代理商： | TRC1315DR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當前第27頁
TRC1300, TRC1315
MARCSTAR
I E/D
REMOTE CONTROL ENCODER/DECODERS
SLWS011D – AUGUST 1996 – REVISED JANUARY 1997
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
general (continued)
Each of the TRC1300 and TRC1315 MARCSTAR I E/D devices can be pin-selected for operation as either an
encoder on the transmitter end of a remote control system, or as a decoder on the receiver end. The intervening
medium can be a wired, RF, IR, or any other type of link with sufficient bandwidth to pass the signal. The objective
is to transmit a function code to the remote receiver to initiate an event or for some other purpose, with the
highest level of certainty that the function code is only accepted from the matching encoder and not from any
other.
A MARCSTAR I E/D device operating in the encoder mode can send four different function codes either
individually or in any combination to activate up to 15 different functions at the decoder.
Once a decoder learns a security code from an encoder, it then responds only to that particular encoder. A
MARCSTAR I E/D device operating in the decoder mode can learn and respond to as many as four different
encoders and provides four independent function outputs. These outputs can be further decoded (externally)
to provide a 1-of-15 function output.
hopping code
The MARCSTAR I E/D devices use an advanced hopping-code algorithm to significantly increase the security
level of the system. The security code sent by the encoder
and the security code accepted as valid by the
decoder change after each transmission. This is done independently for each of the four separate encoder
security codes learned by the decoder.
As an encoder, the MARCSTAR I E/D is shipped from the factory with a unique 40-bit security code stored in
on-board nonvolatile memory (EEPROM). Since every device shipped has a unique code, it is ready for
immediate use and requires no reprogramming. Then, each time a function input is activated, the encoder
fetches the 40-bit security code from EEPROM and encrypts it. Next, the encoder assembles the data frame
to be output, and then sends it out. The data frame consists of the synchronizing bits, the encrypted security
bits, the function data bits, a dummy bit, and the blank-time bits. After the data frames output ends, the encoder
immediately increments the 40-bit security code by applying the special hopping-code algorithm to it and then
stores the results in EEPROM for the next time a function input is activated. Thus, each time a function input
is activated, the 40-bit security code that is sent out is different from the security code in the previous
transmission. And with more than a trillion possible combinations, the same code is never sent twice over the
lifetime of a system.
As a decoder, the MARCSTAR I E/D initially learns the 40-bit security code stored in a particular encoder by
receiving it and storing it in on-board EEPROM. Each time a security code is received from an encoder, the
device decrypts the received 40-bit security code and compares it with the
next security code expected from
any of the learned encoders. The next expected security code is calculated by applying the same hopping-code
algorithm used in the encoder to the 40-bit code stored in the decoder memory. If the received security code
matches the next security code expected from one of the learned encoders, it is declared valid and the attached
function code is decoded. If the function code is valid, the appropriate function output or outputs are asserted.
The just-received 40-bit security code is then incremented according to the algorithm, becoming the next
security code expected from that encoder, and stored in EEPROM for next time. If the received security code
does
not match the next expected code from one of the learned encoders, the received function data and
security code are ignored.
Because the decoder activates function outputs only when the next expected code in the hopping-code
sequence is received, interception and subsequent retransmission of the same code does not activate the
decoder function outputs.
相關PDF資料 |
PDF描述 |
|---|---|
| TRC1315D | RF, REMOTE CONTROL SUPPORT CIRCUIT, PDSO14 |
| TRF7960RHBR | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| TRF7960RHBT | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| TRF7961RHBR | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| TRF7961RHBT | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TRC1315N | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TRC1331S-501 | 功能描述:LED TRIPLE 1.1W COOL WHITE 30DEG RoHS:是 類別:光電元件 >> LED - 高亮度電源模塊 系列:1W-型 標準包裝:36 系列:5027 TFFC STAR K2 顏色:暖白色 配置:星形 在特定電流下的光通量 - 測試:75lm 電流 - 測試:350mA 電流 - 最大:1.5A 帶連接器:無 驅動器電路:無 波長:- 電壓:- |
| TRC1361S-501 | 功能描述:LED TRIPLE 1.1W COOL WHITE 60DEG RoHS:是 類別:光電元件 >> LED - 高亮度電源模塊 系列:1W-型 標準包裝:36 系列:5027 TFFC STAR K2 顏色:暖白色 配置:星形 在特定電流下的光通量 - 測試:75lm 電流 - 測試:350mA 電流 - 最大:1.5A 帶連接器:無 驅動器電路:無 波長:- 電壓:- |
| TRC18FR-X20 | 制造商:Panduit Corp 功能描述:THREADED ROD COVER 18" L- - Bulk |
| TRC18FR-X20Y | 制造商:Panduit Corp 功能描述:Threaded Rod Cover 制造商:Panduit 功能描述:Threaded Rod Cover |
發布緊急采購，3分鐘左右您將得到回復。