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LLCC68 Datasheet(PDF) 87 Page - Semtech Corporation |
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LLCC68 Datasheet(HTML) 87 Page - Semtech Corporation |
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87 / 111 page  LLCC68 Data Sheet Rev. 1.1 DS.LLCC68.W.APP Dec 2024 87 of 111 Semtech LLCC68 www.semtech.com 13.4.6 SetPacketParams This command sets the parameters of the packet handling block. 13.4.6.1 GFSK Packet Parameters The tables below provide more details on the GFSK packet parameters: The preamble length is a 16-bit value which represents the number of bytes which are sent by the radio. Each preamble byte represents an alternating 0 and 1, and each byte is coded as 0x55. The preamble detector acts as a gate to the packet controller, when different from 0x00 (preamble detector length off), the packet controller only becomes active if a certain number of preamble bits have been successfully received by the radio. Table 13-51: SetPacketParams SPI Transaction Byte 0 1 2 3 4 5 6 7 8 9 Data from host for packet type Opcode = 0x8C packet Param1 packet Param2 packet Param3 packet Param4 packet Param5 packet Param6 packet Param7 packet Param8 packet Param9 Table 13-52: GFSK PacketParam1 & PacketParam2 - PreambleLength PreambleLength (15:0) Description 0x0001 to 0xFFFF Transmitted preamble length: number of bits sent as preamble Table 13-53: GFSK PacketParam3 - PreambleDetectorLength PreambleDetector Description 0x00 Preamble detector length off 0x04 Preamble detector length 8 bits 0x05 Preamble detector length 16 bits 0x06 Preamble detector length 24 bits 0x07 Preamble detector length 32 bits Table 13-54: GFSK PacketParam4 - SyncWordLength SyncWordLength Description 0x00 to 0x40 Sync Word length in bits (going from 0 to 8 bytes) |
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