LLCC68 datasheet(4/106 Pages) SEMTECH

4 / 106 page

LLCC68

Data Sheet

Rev. 1.0

DS.LLCC68.W.APP

July 2019

4 of 106

Semtech

www.semtech.com

6.2.3 FSK Packet Format .............................................................................................................. 40

7. Data Buffer ...................................................................................................................................................... 43

7.1 Principle of Operation .................................................................................................................... 43

7.2 Data Buffer in Receive Mode ....................................................................................................... 44

7.3 Data Buffer in Transmit Mode ..................................................................................................... 44

7.4 Using the Data Buffer ..................................................................................................................... 44

8. Digital Interface and Control .................................................................................................................... 45

8.1 Reset ..................................................................................................................................................... 45

8.2 SPI Interface ....................................................................................................................................... 45

8.2.1 SPI Timing When the Transceiver is in Active Mode............................................... 45

8.2.2 SPI Timing When the Transceiver Leaves Sleep Mode .......................................... 46

8.3 Multi-Purpose Digital Input/Output (DIO) ............................................................................. 47

8.3.1 BUSY Control Line ............................................................................................................... 47

8.3.2 Digital Input/Output .......................................................................................................... 49

8.4 Digital Interface Status versus Chip modes ........................................................................... 49

8.5 IRQ Handling ..................................................................................................................................... 50

9. Operational Modes ...................................................................................................................................... 51

9.1 Startup ................................................................................................................................................. 51

9.2 Calibration .......................................................................................................................................... 51

9.2.1 Image Calibration for Specific Frequency Bands ..................................................... 51

9.3 Sleep Mode ........................................................................................................................................ 52

9.4 Standby (STDBY) Mode ................................................................................................................. 52

9.5 Frequency Synthesis (FS) Mode ................................................................................................. 53

9.6 Receive (RX) Mode .......................................................................................................................... 53

9.7 Transmit (TX) Mode ........................................................................................................................ 54

9.7.1 PA Ramping........................................................................................................................... 54

9.8 Active Mode Switching Time ...................................................................................................... 54

9.9 Transceiver Circuit Modes Graphical Illustration ................................................................. 55

10. Host Controller Interface ......................................................................................................................... 56

10.1 Command Structure .................................................................................................................... 56

10.2 Transaction Termination ............................................................................................................ 56

11. List of Commands ...................................................................................................................................... 57

11.1 Operational Modes Commands ............................................................................................... 57

11.2 Register and Buffer Access Commands ................................................................................ 58

11.3 DIO and IRQ Control ..................................................................................................................... 58

11.4 RF, Modulation and Packet Commands ................................................................................ 58

11.5 Status Commands ......................................................................................................................... 59

12. Register Map ................................................................................................................................................ 60

12.1 Register Table ................................................................................................................................. 60

13. Commands Interface................................................................................................................................. 62

13.1 Operational Modes Functions .................................................................................................. 62

13.1.1 SetSleep................................................................................................................................ 62

13.1.2 SetStandby .......................................................................................................................... 63

13.1.3 SetFs....................................................................................................................................... 63

13.1.4 SetTx ...................................................................................................................................... 63

13.1.5 SetRx...................................................................................................................................... 64

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