Quectel AF20 User Manual

Wi-Fi&Bluetooth Module Series
AF20_Hardware_Design
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Contents
Safety Information ........................................................................................................................................ 3
About the Document .................................................................................................................................... 5
Contents .........................................................................................................................................................6
Table Index .................................................................................................................................................... 8
Figure Index ...................................................................................................................................................9
1 Introduction ..........................................................................................................................................10
1.1. Special Mark ...............................................................................................................................10
2 Product Overview ................................................................................................................................11
2.1. Key Features .............................................................................................................................. 11
2.2. Functional Diagram .................................................................................................................... 13
2.3. EVB Kit ....................................................................................................................................... 13
3 Application Interfaces .........................................................................................................................14
3.1. General Description ....................................................................................................................14
3.2. Pin Assignment ...........................................................................................................................15
3.3. Pin Description ........................................................................................................................... 16
3.4. Power Supply ............................................................................................................................. 19
3.5. Wi-Fi Application Interface ......................................................................................................... 21
3.5.1. WLAN_EN ....................................................................................................................... 21
3.5.2. SDIO Interface .................................................................................................................22
3.6. Bluetooth Application Interface .................................................................................................. 23
3.6.1. BT_EN ............................................................................................................................. 24
3.6.2. PCM Interface ..................................................................................................................24
3.6.3. Bluetooth UART .............................................................................................................. 25
3.7. Coexistence UART .....................................................................................................................26
3.8. 32KHZ_IN ...................................................................................................................................26
3.9. RF Antenna Interface ................................................................................................................. 27
3.9.1. Pin Definition of the RF Antenna Interface ..................................................................... 27
3.9.2. Operating Frequency ...................................................................................................... 27
3.9.3. Reference Design ............................................................................................................27
3.9.4. RF Routing Guidelines ....................................................................................................28
3.9.5. Requirements for Antenna Design ..................................................................................30
3.9.6. RF Connector Recommendation .................................................................................... 30
4 Electrical Characteristics & Reliability ............................................................................................. 33
4.1. Absolute Maximum Ratings ....................................................................................................... 33
4.2. Digital I/O Characteristics ...........................................................................................................33
4.3. Power Consumption ...................................................................................................................34
4.4. RF Performances ....................................................................................................................... 35
4.5. ESD Protection ...........................................................................................................................37
5 Mechanical Information ......................................................................................................................38

Quectel AF20 Specifications

General

Brand	Quectel
Model	AF20
Category	GSM/GPRS Modules
Language	English