RFM97W-915S2 datasheet, PDF - EEWORLD Datasheet

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RFM97W-915S2: DescriptionLow Power Long Range Transceiver Module; File Size2MB，121 Pages; ManufacturerETC2

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Low Power Long Range Transceiver Module

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RFM95/96/97/98（W）

RFM95/96/97/98(W) - Low Power Long Range Transceiver Module

GENERAL DESCRIPTION

The

RFM95/96/97/98(W) transceivers

feature

the

long range modem that provides ultra-long range

LoRa

spread spectrum communication and high interference

immunity whilst minimising current consumption.

Using Hope RF’s patented

LoRa

modulation technique

RFM95/96/97/98(W) can achieve a sensitivity of over -

148dBm using a low cost crystal and bill of materials. The

high sensitivity combined with the integrated +20 dBm

power amplifier yields industry leading link budget

making it optimal for any application requiring range or

robustness.

LoRa

also provides significant advantages in

both blocking and selectivity over conventional modulation

techniques, solving the traditional design compromise

between range, interference immunity and energy

consumption.

These devices also support high performance (G)FSK

modes for systems including WMBus, IEEE802.15.4g. The

RFM95/96/97/98(W) deliver exceptional phase noise,

selectivity, receiver linearity and IIP3 for significantly

lower current consumption than competing devices.

V1.0

RFM95/96/97/98(W)

APPLICATIONS

Automated Meter Reading.

Home and Building Automation.

Wireless Alarm and Security Systems.

Industrial Monitoring and Control

Long range Irrigation Systems

KEY PRODUCT FEATURES

LoRa

Modem.

168 dB maximum link budget.

+20 dBm - 100 mW constant RF output vs. V supply.

+14 dBm high efficiency PA.

Programmable bit rate up to 300 kbps.

High sensitivity: down to -148 dBm.

Bullet-proof front end: IIP3 = -12.5 dBm.

Excellent blocking immunity.

Low RX current of 10.3 mA, 200 nA register retention.

Fully integrated synthesizer with a resolution of 61 Hz.

FSK, GFSK, MSK, GMSK,

LoRa

and OOK modulation.

Built-in bit synchronizer for clock recovery.

Preamble detection.

127 dB Dynamic Range RSSI.

Automatic RF Sense and CAD with ultra-fast AFC.

Packet engine up to 256 bytes with CRC.

Built-in temperature sensor and low battery indicator.

Modue Size：16*16mm

Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http:/ / www.hoperf.com

Page 1

RFM95/96/97/98（W）

Section

Page

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

1.1.

1.2.

1.3.

1.4.

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

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

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

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

Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http:/ / www.hoperf.com

Page 2

RFM95/96/97/98（W）

Section

Page

4.2.13. Packet Mode ........................................................................................................................................... 66

4.2.14. io-homecontrol® Compatibility Mode ...................................................................................................... 74

4.3.

SPI Interface .................................................................................................................................................. 75

RFM95/96/97/98(W) Analog & RF Frontend Electronics........................................................................................ 76

5.1. Power Supply Strategy .................................................................................................................................. 76

5.2. Low Battery Detector ..................................................................................................................................... 76

5.3. Frequency Synthesis ..................................................................................................................................... 76

5.3.1. Crystal Oscillator ....................................................................................................................................... 76

5.3.2. CLKOUT Output ........................................................................................................................................ 77

5.3.3. PLL ............................................................................................................................................................ 77

5.3.4. RC Oscillator ............................................................................................................................................. 77

5.4.

Transmitter Description ...............................................................................................................................78

5.4.1. Architecture Description ............................................................................................................................ 78

5.4.2. RF Power Amplifiers.................................................................................................................................. 78

5.4.3. High Power +20 dBm Operation ............................................................................................................... 79

5.4.4. Over Current Protection .........................................................................................................................80

5.5. Receiver Description ...................................................................................................................................... 80

5.5.1. Overview ................................................................................................................................................... 80

5.5.2. Receiver Enabled and Receiver Active States .......................................................................................... 80

5.5.3. Automatic Gain Control In FSK/OOK Mode .............................................................................................. 80

5.5.4. RSSI in FSK/OOK Mode ........................................................................................................................... 81

5.5.5. RSSI in LoRaTM Mode ............................................................................................................................. 82

5.5.6. Channel Filter ............................................................................................................................................ 82

5.5.7. Temperature Measurement ....................................................................................................................... 83

Description of the Registers.................................................................................................................................... 84

6.1. Register Table Summary ............................................................................................................................... 84

6.2.

FSK/OOK Mode Register Map....................................................................................................................... 87

6.3. Band Specific Additional Registers .............................................................................................................. 100

6.4. LoRaTM Mode Register Map ....................................................................................................................... 102

Application Information ........................................................................................................................................ 108

7.1. Crystal Resonator Specification ................................................................................................................... 108

7.2. Reset of the Chip ......................................................................................................................................... 108

7.2.1. POR......................................................................................................................................................... 108

7.2.2. Manual Reset .......................................................................................................................................109

7.3. Top Sequencer: Listen Mode Examples ...................................................................................................... 109

7.3.1. Wake on Preamble Interrupt ................................................................................................................... 109

7.3.2. Wake on SyncAddress Interrupt ...........................................................................................................112

7.4.

Top Sequencer: Beacon Mode .................................................................................................................115

7.4.1. Timing diagram........................................................................................................................................ 115

Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http:/ / www.hoperf.com

Page 3

RFM95/96/97/98(W)

Section

Page

Table 1. RFM95/96/97/98(W) Device Variants and Key Parameters .............................................................................10

Table 2. Absolute Maximum Ratings .............................................................................................................................12

Table 3. Operating Range .............................................................................................................................................12

Table 4. Power Consumption Specification ...................................................................................................................13

Table 5. Frequency Synthesizer Specification ..............................................................................................................13

Table 6. FSK/OOK Receiver Specification ....................................................................................................................14

Table 7. Transmitter Specification .................................................................................................................................15

Table 8. LoRa Receiver Specification. ..........................................................................................................................17

Table 9. Digital Specification .........................................................................................................................................19

Table 10. Example LoRaTM Modem Performances .....................................................................................................22

Table 11. Range of Spreading Factors ..........................................................................................................................24

Table 12. Cyclic Coding Overhead ................................................................................................................................24

Table 13. LoRaTM Operating Mode Functionality .........................................................................................................31

Table 14. LoRa CAD Consumption Figures ..................................................................................................................40

Table 15. DIO Mapping LoRaTM Mode .........................................................................................................................41

Table 16. Bit Rate Examples .........................................................................................................................................42

Table 17. Preamble Detector Settings ...........................................................................................................................48

Table 18. RxTrigger Settings to Enable Timeout Interrupts ..........................................................................................49

Table 19.

Table 20.

Table 21.

Table 22.

Table 23.

Table 24.

Table 25.

Table 26.

Table 27.

Table 28.

Table 29.

Table 30.

Table 31.

Table 32.

Table 33.

Table 34.

Table 35.

Table 36.

Table 37.

Table 38.

Table 39.

Basic Transceiver Modes ..............................................................................................................................50

Receiver Startup Time Summary ..................................................................................................................51

Receiver Startup Options ..............................................................................................................................54

Sequencer States ..........................................................................................................................................55

Sequencer Transition Options .......................................................................................................................56

Sequencer Timer Settings .............................................................................................................................58

Status of FIFO when Switching Between Different Modes of the Chip .........................................................62

DIO Mapping, Continuous Mode ...................................................................................................................64

DIO Mapping, Packet Mode ..........................................................................................................................64

CRC Description ...........................................................................................................................................72

Power Amplifier Mode Selection Truth Table ................................................................................................78

High Power Settings ......................................................................................................................................79

Operating Range, +20dBm Operation ...........................................................................................................79

Trimming of the OCP Current ........................................................................................................................80

LNA Gain Control and Performances ............................................................................................................81

RssiSmoothing Options .................................................................................................................................82

Available RxBw Settings ................................................................................................................................82

Registers Summary .......................................................................................................................................84

Register Map .................................................................................................................................................87

Low Frequency Additional Registers ...........................................................................................................100

Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http:/ / www.hoperf.com

Page 5

RFM97W-915S2 Related Products

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