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參數(shù)資料
型號: SI4021-A1-FT
廠商: Silicon Laboratories Inc
文件頁數(shù): 29/34頁
文件大小: 783K
描述: IC TX FSK 915MHZ 5.4V 16-TSSOP
標準包裝: 96
頻率: 433MHz,868MHz,915MHz
調制或協(xié)議: FSK,OOK
數(shù)據(jù)傳輸率 - 最大: 512kbps
功率 - 輸出: 8dBm
電流 - 傳輸: 24mA
數(shù)據(jù)接口: PCB,表面貼裝
天線連接器: PCB,表面貼裝
電源電壓: 2.2 V ~ 5.4 V
工作溫度: -40°C ~ 85°C
封裝/外殼: 16-TSSOP(0.173",4.40mm 寬)
包裝: 管件
產品目錄頁面: 585 (CN2011-ZH PDF)
其它名稱: 336-1622-5
Si4021
 
 
29
EXAMPLE APPLICATIONS: DATA PACKET TRANSMISSION
Data packet structure
An example data packet structure using the IA422x  IA4320 pair for data transmission. This packet structure is an example of how to use
the high efficiency FIFO mode at the receiver side:
 
AA
AA
AA
2D
D4
Databytes (received in the
FIFO of the receiver)
Preamble
Synchron pattern
D
0
D
1
D
2
. . .
D
N
 
The first 3 bytes compose a 24 bit length 01 pattern to let enough time for the clock recovery of the receiver to lock. The next two bytes
compose a 16 bit synchron pattern which is essential for the receivers FIFO to find the byte synchron in the received bit stream. The
synchron patters is followed by the payload. The first byte transmitted after the synchron pattern (D
0
 in the picture above) will be the first
received byte in the FIFO.
Important: The bytes of the data stream should follow each other continuously, otherwise the clock recovery circuit of the receiver side will
be unable to track.
Further details of packet structures can be found in the IA ISM-UGSB1 software development kit manual.
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