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LLCC68 bảng dữ liệu(PDF) 95 Page - Semtech Corporation

tên linh kiện LLCC68
Giải thích chi tiết về linh kiện  Long Range, Low Power, sub-GHz RF Transceiver
PDF  111 Pages
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nhà sản xuất  SEMTECH [Semtech Corporation]
Trang chủ  http://www.semtech.com
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LLCC68 bảng dữ liệu(HTML) 95 Page - Semtech Corporation

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LLCC68
Data Sheet
Rev. 1.1
DS.LLCC68.W.APP
Dec 2024
95 of 111
Semtech
LLCC68
www.semtech.com
13.5.2 GetRxBufferStatus
This command returns the length of the last received packet (PayloadLengthRx) and the address of the first byte received
(RxStartBufferPointer). It is applicable to all modems. The address is an offset relative to the first byte of the data buffer.
13.5.3 GetPacketStatus
The next table gives the description of the different RSSI and SNR available on the chip depending on the packet type.
Table 13-78: GetRxBufferStatus SPI Transaction
Byte
0
1
2
3
Data from host
Opcode = 0x13
NOP
NOP
NOP
Data to host
RFU
Status
PayloadLengthRx
RxStartBufferPointer
Table 13-79: GetPacketStatus SPI Transaction
Byte
0
1
2
3
4
Data from host
Opcode = 0x14
NOP
NOP
NOP
NOP
Data to host for FSK packet type
RFU
Status
RxStatus
RssiSync
RssiAvg
Data to host for LoRa packet type
RFU
Status
RssiPkt
SnrPkt
SignalRssiPkt
Table 13-80: Status Fields (Sheet 1 of 2)
RSSI
Description
RxStatus
FSK
bit 7: preamble err
bit 6: sync err
bit 5: adrs err
bit 4: crc err
bit 3: length err
bit 2: abort err
bit 1: pkt received
bit 0: pkt sent
RssiSync
FSK
RSSI value latched upon the detection of the sync address.
[negated,dBm, fixdt(0,8,1)]
Actual signal power is –RssiSync/2 (dBm)
RssiAvg
FSK
RSSI average value over the payload of the received packet. Latched upon the pkt_done IRQ.
[negated,dBm, fixdt(0,8,1)]
Actual signal power is –RssiAvg/2 (dBm)
RssiPkt
LoRa
Average over last packet received of RSSI
Actual signal power is –RssiPkt/2 (dBm)



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