Quectel FC908A Hardware Design page 9

Wi-Fi&Bluetooth Module Series
Figure Index
Figure 1: Functional Diagram of FC908A ........................................................................ 错误!未定义书签。
Figure 2: Pin Assignment (Top View) ........................................................................................................ 17
Figure 3: VBAT Circuit................................................................................................................................ 21
Figure 4: Power-up Timing ......................................................................................................................... 21
Figure 5: Recommended Reference Design Circuit .................................................................................. 22
Figure 6: WLAN Application Interface Connection .................................................................................... 23
Figure 7: SDIO Interface Connection ......................................................................................................... 24
Figure 8: Block Diagram of Bluetooth Application Interface Connection ................................................... 27
Figure 9: Reference Design for UART Interface Connection .................................................................... 28
Figure 10: PCM Interface Connection ........................................................................................................ 29
Figure 11: Reference Design ..................................................................................................................... 33
Figure 12: Microstrip Design on a 2-layer PCB ......................................................................................... 33
Figure 13: Coplanar Waveguide Design on a 2-layer PCB ....................................................................... 33
Figure 14: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) .................... 34
Figure 15: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) .................... 34
Figure 16: Dimensions of the U.FL-R-SMT Connector (Unit: mm) ............................................................ 36
Figure 17: Mechanicals of U.FL-LP Connectors ........................................................................................ 36
Figure 18: Space Factor of Mated Connector (Unit: mm) .......................................................................... 37
Figure 19: Top and Side Dimensions (Top and Side View) ....................................................................... 42
Figure 20: Bottom Dimension (Top View) .................................................................................................. 43
Figure 21: Recommended Footprint (Top View) ........................................................................................ 44
Figure 22: Top and Bottom Views of the Module ....................................................................................... 45
Figure 23: Recommended Reflow Soldering Thermal Profile ................................................................... 47
Figure 24: Carrier Tape Dimension Drawing ............................................................................................. 49
Figure 25: Plastic Reel Dimension Drawing .............................................................................................. 49
Figure 26: Packaging Process ................................................................................................................... 50
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