User's Guide

Table of Contents
1. WFM200 Pinout ..............................3
2. Device Configuration ............................5
3. Features Description ............................6
3.1 WFM200 RF Ports.............................6
3.2 Host Interface ..............................7
3.3 Programmable Pins ............................8
3.3.1 Multi-Protocol Coexistence ........................8
3.3.2 FEM ................................8
3.3.3 Common Features for Programmable Pins ...................8
3.4 Clocks .................................8
4. Power Supplies ..............................9
5. Application Schematic Recommendations ...................10
5.1 Power Supplies – Schematics .........................10
5.2 RF Ports – Schematics ...........................10
6. Typical Application Schematics .......................11
7. Layout Recommendations .........................13
7.1 Generic RF Layout Considerations .......................14
7.2 GND and RF Pads Including the Diversity Port and External Antennas ...........16
7.3 Module Antenna .............................17
7.3.1 Small Board Size Recommendations for Good RF Performance ............18
7.3.2 Extended X Dimension Recommendation for Good RF Performance ..........19
7.3.3 Y Dimension (65 to 80 mm) Recommendation for Good RF Performance .........20
7.3.4 Y Dimension (80 mm or Larger) Recommendation for Good RF Performance .......21
7.3.5 WFM200 Portion One Corner Bias with 3 mm Metal Keep-Outs ............22
7.3.6 Recommended Antenna Loop Trace Capacitor Values ...............23
7.4 WFM200 Reference Evaluation Board ......................24
8. Recommendations for Certification ......................27
8.1 Qualified External Antenna Type ........................27
8.2 Certified Module Antenna ..........................28
8.3 CE Certification Requirements.........................29
9. Package Outline .............................30
10. Integral Antenna Loop and Keep-Out Required Dimensions ............33
11. Recommended PCB Land Pattern ......................35
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