Quectel Wireless Solutions Company Limited 201807EG95NA Manuale Utente

LTE Module Series

EG95 Hardware Design

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Figure Index

FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 15

FIGURE 2: PIN ASSIGNMENT (TOP VIEW)..................................................................................................... 17

FIGURE 3: SLEEP MODE APPLICATION VIA UART ....................................................................................... 25

FIGURE 4: SLEEP MODE APPLICATION WITH USB REMOTE WAKEUP .................................................... 26

FIGURE 5: SLEEP MODE APPLICATION WITH RI ......................................................................................... 26

FIGURE 6: SLEEP MODE APPLICATION WITHOUT SUSPEND FUNCTION ................................................ 27

FIGURE 7: POWER SUPPLY LIMITS DURING BURST TRANSMISSION ...................................................... 29

FIGURE 8: STAR STRUCTURE OF THE POWER SUPPLY............................................................................ 29

FIGURE 9: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 30

FIGURE 10: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................. 31

FIGURE 11: TURN ON THE MODULE USING BUTTON ................................................................................. 31

FIGURE 12: TIMING OF TURNING ON MODULE ........................................................................................... 32

FIGURE 13: TIMING OF TURNING OFF MODULE ......................................................................................... 33

FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 34

FIGURE 15: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 34

FIGURE 16: TIMING OF RESETTING MODULE ............................................................................................. 34

FIGURE 17: REFERENCE CIRCUIT OF (U)SIM1 INTERFACE WITH AN 8-PIN (U)SIM CARD CONNECTOR

...................................................................................................................................................................

FIGURE 18: REFERENCE CIRCUIT OF (U)SIM1 INTERFACE WITH A 6-PIN (U)SIM CARD CONNECTOR 36

FIGURE 19: REFERENCE CIRCUIT OF (U)SIM2 INTERFACE WITH AN 8-PIN (U)SIM CARD CONNECTOR

...................................................................................................................................................................

FIGURE 20: REFERENCE CIRCUIT OF (U)SIM2 INTERFACE WITH A 6-PIN (U)SIM CARD CONNECTOR 37

FIGURE 21: REFERENCE CIRCUIT OF USB INTERFACE ............................................................................ 39

FIGURE 22: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 41

FIGURE 23: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 42

FIGURE 24: PRIMARY MODE TIMING ............................................................................................................ 43

FIGURE 25: AUXILIARY MODE TIMING .......................................................................................................... 43

FIGURE 26: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 44

FIGURE 27: REFERENCE CIRCUIT OF SPI INTERFACE WITH PERIPHERALS ......................................... 45

FIGURE 28: REFERENCE CIRCUIT OF THE NETWORK STATUS INDICATOR ........................................... 46

FIGURE 29: REFERENCE CIRCUIT OF STATUS ........................................................................................... 47

FIGURE 30: REFERENCE CIRCUIT OF RF ANTENNA INTERFACE ............................................................. 51

FIGURE 31: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ...................................................................... 52

FIGURE 32: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB .................................................. 52

FIGURE 33: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE

GROUND) .................................................................................................................................................. 53

FIGURE 34: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE

GROUND) .................................................................................................................................................. 53

FIGURE 35: REFERENCE CIRCUIT OF GNSS ANTENNA.............................................................................

FIGURE 36: DIMENSIONS OF THE U.FL-R-SMT CONNECTOR (UNIT: MM) ................................................ 56

FIGURE 37: MECHANICALS OF U.FL-LP CONNECTORS ............................................................................. 56