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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LLCC68 데이터시트(PDF) 95 Page - Semtech Corporation |
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LLCC68 데이터시트(HTML) 95 Page - Semtech Corporation |
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95 / 111 page  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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