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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LLCC68 bảng dữ liệu(PDF) 96 Page - Semtech Corporation |
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LLCC68 bảng dữ liệu(HTML) 96 Page - Semtech Corporation |
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96 / 111 page  LLCC68 Data Sheet Rev. 1.1 DS.LLCC68.W.APP Dec 2024 96 of 111 Semtech LLCC68 www.semtech.com 13.5.4 GetRssiInst This command returns the instantaneous RSSI value during reception of the packet. The command is valid for all protocols. With GFSK, the RSSI settling time varies with the BW, as described in the following table. The RSSI delay is the delay between the moment the chip is put in Rx mode i.e. busy falling edge, and the moment the first RSSI value is available. The RSSI averaging window is the delay between two RSSI samples. SnrPkt LoRa Estimation of SNR on last packet received in two’s compliment format multiplied by 4. Actual SNR in dB = SnrPkt/4 SignalRssiPkt LoRa Estimation of RSSI of the LoRa signal (after despreading) on last packet received Actual Rssi in dB = -SignalRssiPkt/2 Table 13-81: GetRssiInst SPI Transaction Byte 0 1 2 Data from host Opcode = 0x15 NOP NOP Data to host RFU Status RssiInst Signal power indBm = –RssiInst/2 (dBm) Table 13-82: RSSI Settling Time per Bandwidth Bandwidth RSSI delay (s) RSSI averaging window (s) LLCC6X_GFSK_BW_4800 2295 192 LLCC6X_GFSK_BW_5800 1913 160 LLCC6X_GFSK_BW_7300 1531 128 LLCC6X_GFSK_BW_9700 1152 96 LLCC6X_GFSK_BW_11700 960 80 LLCC6X_GFSK_BW_14600 769 64 LLCC6X_GFSK_BW_19500 581 48 LLCC6X_GFSK_BW_23400 484 40 LLCC6X_GFSK_BW_29300 388 32 LLCC6X_GFSK_BW_39000 295 24 LLCC6X_GFSK_BW_46900 246 20 LLCC6X_GFSK_BW_58600 197 16 LLCC6X_GFSK_BW_78200 152 12 LLCC6X_GFSK_BW_93800 127 10 Table 13-80: Status Fields (Sheet 2 of 2) RSSI Description |
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