Service Guide

Wi-Fi&Bluetooth Module Series
FC909A_Hardware_Design 5 / 49
Contents
Safety Information .................................................................................................................................... 3
About the Document ................................................................................................................................ 4
Contents .................................................................................................................................................... 5
Table Index ............................................................................................................................................... 7
Figure Index .............................................................................................................................................. 8
1 Introduction ....................................................................................................................................... 9
1.1. Special Mark ........................................................................................................................... 13
2 Product Overview ............................................................................................................................ 14
2.1. General Description ................................................................................................................ 14
2.2. Key Features .......................................................................................................................... 14
2.3. EVB ........................................................................................................................................ 16
3 Application Interfaces ..................................................................................................................... 17
3.1. General Description ................................................................................................................ 17
3.2. Pin Description ....................................................................................................................... 17
3.3. Power Supply ......................................................................................................................... 20
3.3.1. Power Supply Pins ...................................................................................................... 20
3.3.2. Buck Circuit Pins ......................................................................................................... 21
3.4. WLAN Application Interfaces .................................................................................................. 22
3.4.1. SDIO Interface ............................................................................................................. 22
3.4.2. WLAN_EN ................................................................................................................... 24
3.4.3. WLAN_WAKE ............................................................................................................. 24
3.4.4. Introduction of WLAN Pin Multiplexing Function .......................................................... 26
3.5. Bluetooth Application Interfaces ............................................................................................. 27
3.5.1. UART .......................................................................................................................... 27
3.5.2. BT_EN ......................................................................................................................... 28
3.5.3. BT_WAKE_HOST and HOST_WAKE_BT .................................................................. 29
3.5.4. PCM Interface ............................................................................................................. 29
3.6. Other Interfaces ...................................................................................................................... 30
3.6.1. WLAN_SLP_CLK ........................................................................................................ 30
3.6.2. XTAL_IN/OUT ............................................................................................................. 30
3.6.3. GPIOs ......................................................................................................................... 31
4 RF Antenna Interfaces .................................................................................................................... 32
4.1. RF Antenna ............................................................................................................................ 32
4.1.1. Antenna Interface & Frequency Bands ........................................................................ 32
4.1.2. Reference Design ........................................................................................................ 32
4.2. Reference Design of RF Routing ............................................................................................ 33
4.3. Requirements for Antenna Design ......................................................................................... 35