RFM95 datasheet(2/121 Pages) HOPERF

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RFM95/96/97/98（W）

Section

Page

General Description ................................................................................................................................................. 9

1.1.

Simplified Block Diagram ................................................................................................................................. 9

1.2.

Product Versions .........................................................................................................................................10

1.3.

Pin Diagram ................................................................................................................................................... 10

1.4.

Pin Description............................................................................................................................................... 11

Electrical Characteristics ....................................................................................................................................... 12

2.1.

ESD Notice .................................................................................................................................................... 12

2.2.

Absolute Maximum Ratings ........................................................................................................................... 12

2.3.

Operating Range............................................................................................................................................ 12

2.4.

Chip Specification .......................................................................................................................................13

2.4.1. Power Consumption .................................................................................................................................. 13

2.4.2. Frequency Synthesis................................................................................................................................. 13

2.4.3. FSK/OOK Mode Receiver ......................................................................................................................... 14

2.4.4. FSK/OOK Mode Transmitter ..................................................................................................................... 15

2.4.5. Electrical specification for LoraTM modulation.......................................................................................... 16

2.4.6. Digital Specification ................................................................................................................................... 19

RFM95/96/97/98(W) Features................................................................................................................................ 20

3.1.

LoRaTM Modem ............................................................................................................................................. 21

3.2.

FSK/OOK Modem ........................................................................................................................................... 21

RFM95/96/97/98(W) Digital Electronics ................................................................................................................. 22

4.1.

The LoRaTM Modem ..................................................................................................................................... 22

4.1.1. Link Design Using the LoRaTM Modem .................................................................................................23

4.1.2. LoRaTM Digital Interface ........................................................................................................................29

4.1.3. Operation of the LoRaTM Modem............................................................................................................. 31

4.1.4. Frequency Settings ................................................................................................................................32

4.1.5. LoRaTM Modem State Machine Sequences ...........................................................................................33

4.2.

FSK/OOK Modem .......................................................................................................................................... 41

4.2.1. Bit Rate Setting ......................................................................................................................................... 41

4.2.2. FSK/OOK Transmission ............................................................................................................................ 42

4.2.3. FSK/OOK Reception ................................................................................................................................. 43

4.2.4. Operating Modes in FSK/OOK Mode ........................................................................................................ 50

4.2.5. Startup Times ............................................................................................................................................ 50

4.2.6. Receiver Startup Options .......................................................................................................................... 53

4.2.7. Receiver Restart Methods......................................................................................................................... 54

4.2.8. Top Level Sequencer ................................................................................................................................ 55

4.2.9. Data Processing in FSK/OOK Mode ......................................................................................................... 60

4.2.10. FIFO .....................................................................................................................................................61

4.2.11. Digital IO Pins Mapping........................................................................................................................... 64

4.2.12. Continuous Mode .................................................................................................................................... 65

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