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RFM67W

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Table of contents

Section

Page

1.

General Description ................................................................................................................................................. 4

1.1.

Simplified Block Diagram ................................................................................................................................. 4

1.2.

Pin Diagram ..................................................................................................................................................... 5

1.3.

Pin Description..............................................................................................................................................6

2.

Electrical Characteristics ......................................................................................................................................... 7

2.1.

ESD Notice ...................................................................................................................................................... 7

2.2.

Absolute Maximum Ratings ............................................................................................................................. 7

2.3.

Operating Range.............................................................................................................................................. 7

2.4.

Electrical Specifications.................................................................................................................................8

3.

Timing Characteristics ............................................................................................................................................. 9

4.

Working Modes of the RFM67W ..............................................................................................................................10

4.1.

Operating Modes ........................................................................................................................................... 10

4.2.

Application Modes.......................................................................................................................................... 10

4.2.1.

Stand Alone Mode .................................................................................................................................. 10

4.2.2.

MCU Mode.............................................................................................................................................. 11

5.

Operation of the RFM67W .......................................................................................................................................12

5.1.

Main Parameters............................................................................................................................................ 12

5.1.1.

Center Frequency ................................................................................................................................... 12

5.1.2.

Frequency Deviation ............................................................................................................................... 12

5.1.3.

Bit Rate ................................................................................................................................................... 12

5.2.

Synthesizer .................................................................................................................................................... 13

5.3.

The Power Amplifier....................................................................................................................................... 14

6.

Digital Control and Interface .................................................................................................................................. 15

6.1.

Stand Alone Mode ......................................................................................................................................... 15

6.1.1.

State Machine Description ...................................................................................................................... 15

6.1.2.

Memory Organization of the E2PROM ................................................................................................... 15

6.1.3.

Periodic mode ......................................................................................................................................... 17

6.1.4.

Low Battery Indicator: Stand Alone Mode............................................................................................... 18

6.1.5.

Low Battery Indicator: MCU Mode .......................................................................................................... 18

6.2.

MCU Mode..................................................................................................................................................... 18

6.2.1.

SPI Operation ......................................................................................................................................... 18

6.2.2.

Data and Data Clock Usage..................................................................................................................20

6.3.

RFM67W Register Description....................................................................................................................21

7.

RFM67W Application Circuits ...................................................................................................................................26

7.1.

Typical Application Schematic...........................................................................................................................26