Table of Contents

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AX5031

3

Registers ............................................................................................................................................ 19

5.6. RF Output Stage (ANTP/ANTN)..................................................................................................... 20

5.7. Encoder ............................................................................................................................................ 20

5.8. Framing and FIFO ........................................................................................................................... 21

HDLC Mode...................................................................................................................................... 22

RAW Mode ....................................................................................................................................... 22

802.15.4 (ZigBee) ............................................................................................................................. 22

5.9. Modulator ........................................................................................................................................ 23

5.10.

PWRMODE Register................................................................................................................... 24

5.11.

Serial Peripheral Interface (SPI) .............................................................................................. 25

SPI Timing .......................................................................................................................................... 25

6. Register Bank Description .........................................................................................................26

6.1. Control Register Map..................................................................................................................... 27

7. Application Information ............................................................................................................30

7.1. Typical Application Diagram ....................................................................................................... 30

7.2. Antenna Interface Circuitry.......................................................................................................... 31

Single-Ended Antenna Interface ................................................................................................. 31

7.3. Voltage Regulator.......................................................................................................................... 31

8. QFN20 Package Information ....................................................................................................32

8.1. Package Outline QFN20 ............................................................................................................... 32

8.2. QFN Soldering Profile...................................................................................................................... 33

8.3. QFN Recommended Pad Layout ............................................................................................... 34

8.4. Assembly Process............................................................................................................................ 34

Stencil Design & Solder Paste Application ................................................................................. 34