SI4022-A0-FT【PDF 18/20 页】IC TX FSK UNI 868/915MHZ 16TSSOP

Si4022

EXAMPLE APPLICATIONS: DATA PACKET TRANSMISSION

Data packet structure

An example data packet structure using theSi4022 Si4022 pair for data transmission. This packet structure is an example of how to use the

high efficiency FIFO mode at the receiver side:

Databytes (received in the

FIFO of the receiver)

Preamble

Synchron pattern

. . .

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

in the picture above) will be the first

received byte in the FIFO.

Important:

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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