LLCC68 datasheet(8/106 Pages) SEMTECH

8 / 106 page

LLCC68

Data Sheet

Rev. 1.0

DS.LLCC68.W.APP

July 2019

8 of 106

Semtech

www.semtech.com

List of Tables

Table 2-1: LLCC68 Pinout in QFN 4x4 24L ............................................................................................... 12

Table 3-1: ESD and Latch-up Notice .......................................................................................................... 14

Table 3-2: Absolute Maximum Ratings..................................................................................................... 14

Table 3-3: Operating Range.......................................................................................................................... 14

Table 3-4: Crystal Specifications ................................................................................................................. 15

Table 3-5: Power Consumption................................................................................................................... 16

Table 3-6: Power Consumption in Transmit Mode .............................................................................. 17

Table 3-7: General Specifications ............................................................................................................... 18

Table 3-8: Receive Mode Specifications................................................................................................... 19

Table 3-9: Transmit Mode Specifications................................................................................................. 21

Table 3-10: Digital I/O Specifications ........................................................................................................ 21

Table 4-1: Internal Foot Capacitor Configuration................................................................................. 23

Table 4-2: Intermediate Frequencies in FSK Mode .............................................................................. 25

Table 4-3: Intermediate Frequencies in LoRa® Mode.......................................................................... 26

Table 4-4: Power Amplifier Summary ....................................................................................................... 28

Table 5-1: Regulation Type versus Circuit Mode................................................................................... 29

Table 5-2: OCP Configuration ...................................................................................................................... 29

Table 5-3: Recommended 15 μH Inductors ............................................................................................ 31

Table 6-1: Range of Spreading Factors (SF) ............................................................................................ 33

Table 6-2: Signal Bandwidth Setting in LoRa® Mode........................................................................... 34

Table 6-3: Coding Rate Overhead .............................................................................................................. 34

Table 6-4: Bandwidth Definition in FSK Packet Type .......................................................................... 38

Table 6-5: Whitening Initial Value .............................................................................................................. 41

Table 6-6: CRC Type Configuration............................................................................................................ 42

Table 6-7: CRC Initial Value ........................................................................................................................... 42

Table 6-8: CRC Polynomial ............................................................................................................................ 42

Table 8-1: SPI Timing Requirements.......................................................................................................... 46

Table 8-2: Switching Time............................................................................................................................. 48

Table 8-3: Digital Pads Configuration for each Chip Mode............................................................... 49

Table 8-4: IRQ Status Registers .................................................................................................................... 50

Table 9-1: LLCC68 Operating Modes......................................................................................................... 51

Table 9-2: Image Calibration Over the ISM Bands ................................................................................ 52

Table 9-3: Rx Gain Configuration................................................................................................................ 53

Table 10-1: SPI Interface Command Sequence ..................................................................................... 56

Table 11-1: Commands Selecting the Operating Modes of the Radio ......................................... 57

Table 11-2: Commands to Access the Radio Registers and FIFO Buffer....................................... 58

Table 11-3: Commands Controlling the Radio IRQs and DIOs......................................................... 58

Table 11-4: Commands Controlling the RF and Packets Settings .................................................. 58

Table 11-5: Commands Returning the Radio Status............................................................................ 59

Table 12-1: List of Registers .......................................................................................................................... 60

Table 13-1: SetSleep SPI Transaction ........................................................................................................ 62

Table 13-2: Sleep Mode Definition............................................................................................................. 62

Table 13-3: SetConfig SPI Transaction ...................................................................................................... 63

Table 13-4: STDBY Mode Configuration .................................................................................................. 63

Table 13-5: SetFs SPI Transaction ............................................................................................................... 63

Table 13-6: SetTx SPI Transaction............................................................................................................... 63

Table 13-7: SetTx Timeout Duration.......................................................................................................... 64

Table 13-8: SetRx SPI Transaction............................................................................................................... 64

Table 13-9: SetRx Timeout Duration ......................................................................................................... 65

Table 13-10: StopTimerOnPreamble SPI Transaction ......................................................................... 65

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