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LLCC68 Datasheet(PDF) 91 Page - Semtech Corporation

Part # LLCC68
Description  Long Range, Low Power, sub-GHz RF Transceiver
PDF  111 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

LLCC68 Datasheet(HTML) 91 Page - Semtech Corporation

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LLCC68
Data Sheet
Rev. 1.1
DS.LLCC68.W.APP
Dec 2024
91 of 111
Semtech
LLCC68
www.semtech.com
13.4.6.2 LoRa Packet Parameters
The tables below provide more details on the LoRa packet parameters:
The preamble length is a 16-bit value which represents the number of LoRa symbols which are sent by the radio.
When the byte HeaderType is at 0x00, the payload length, coding rate and the header CRC are added to the LoRa header and transported
to the receiver.
Table 13-66: LoRa PacketParam1 & PacketParam2 - PreambleLength
PreambleLength (15:0)
Description
0x0001 to 0xFFFF
Preamble length: number of symbols sent as preamble
Table 13-67: LoRa PacketParam3 - HeaderType
HeaderType
Description
0x00
Variable length packet (explicit header)
0x01
Fixed length packet (implicit header)
Table 13-68: LoRa PacketParam4 - PayloadLength
Payloadlength
Description
0x00 to 0xFF
Size of the payload (in bytes) to transmit or maximum size of the payload that the receiver can accept.
Table 13-69: LoRa PacketParam5 - CRCType
CRCType
Description
0x00
CRC OFF
0x01
CRC ON
Table 13-70: LoRa PacketParam6 - InvertIQ
AddrComp
Description
0x00
Standard IQ setup
0x01
Inverted IQ setup



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