Quectel FGM842D Hardware Design page 9

Wi-Fi&Bluetooth Module
Figure Index
Figure 2 :FGM842D Pin Assignment (Top View) ....................................................................................... 13
Figure 4 : UART1 Connection .................................................................................................................... 18
Figure 5 : UART2 Reference Design ......................................................................................................... 18
Figure 6 : SPI Connection (Master Mode) ................................................................................................. 19
Figure 7 : SPI Connection (Slave Mode) ................................................................................................... 19
Figure 8 : Reference Circuit of Power Supply ............................................................................................ 23
Figure 9 : Turn-on Timing ........................................................................................................................... 23
Figure 10 : Reference Circuit of CHIP_EN by Using a Driving Circuit ...................................................... 24
Figure 11 : Reference Circuit of RESET with a Button .............................................................................. 24
Figure 12 : Reset Timing ............................................................................................................................ 25
Figure 18 : Dimensions of the Receptacle (Unit: mm) ............................................................................... 29
Figure 19 : Space Factor of the Mated Connectors (Unit: mm) ................................................................. 30
Figure 20 : Plug in a Coaxial Cable Plug ................................................................................................... 31
Figure 21 : Pull out a Coaxial Cable Plug .................................................................................................. 31
Figure 22 : Install the Coaxial Cable Plug with Jig ..................................................................................... 32
Figure 24 :FGM842D Top and Side Dimensions ....................................................................................... 36
Figure 25 :FGM842D Bottom Dimensions (Bottom View) ......................................................................... 37
Figure 29 : FGM842D Top and Bottom Views ........................................................................................... 38
Figure 31 : Recommended Reflow Soldering Thermal Profile .................................................................. 40
Figure 32 : Carrier Tape Dimension Drawing (Unit: mm) .......................................................................... 42
Figure 33 : Plastic Reel Dimension Drawing ............................................................................................. 43
Figure 34 : Mounting Direction ................................................................................................................... 43
Figure 35 : Packaging Process .................................................................................................................. 44
FGM842D_Hardware_Design 8 / 50