Quectel EM12-G, Проектирование аппаратного обеспечения

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LTE-A Module Series
EM12-G Hardware Design
EM12-G_Hardware_Design 6 / 62
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 15
FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 17
FIGURE 3: POWER SUPPLY LIMITS DURING RADIO TRANSMISSION ....................................................... 23
FIGURE 4: REFERENCE CIRCUIT OF VCC .................................................................................................... 23
FIGURE 5: REFERENCE DESIGN OF POWER SUPPLY ............................................................................... 24
FIGURE 6: TURN ON THE MODULE THROUGH GPIO CONTROLLED FULL_CARD_POWER_OFF# ....... 25
FIGURE 7: TURN ON THE MODULE AUTOMATICALLY ................................................................................. 25
FIGURE 8: TIMING OF TURNING ON MODULE ............................................................................................. 26
FIGURE 9: TIMING OF TURNING OFF THE MODULE THROUGH FULL_CARD_POWER_OFF# ............... 26
FIGURE 10: REFERENCE CIRCUIT OF RESET# BY USING DRIVING CIRCUIT ......................................... 27
FIGURE 11: REFERENCE CIRCUIT OF RESET# BY USING BUTTON ......................................................... 28
FIGURE 12: TIMING OF RESETTING MODULE ............................................................................................. 28
FIGURE 13: REFERENCE CIRCUIT OF NORMALLY SHORT-CIRCUITED (U)SIM CARD CONNECTOR ... 30
FIGURE 14: REFERENCE CIRCUIT OF NORMALLY OPEN (U)SIM CARD CONNECTOR .......................... 30
FIGURE 15: REFERENCE CIRCUIT OF A 6-PIN (U)SIM CARD CONNECTOR ............................................. 31
FIGURE 16: REFERENCE CIRCUIT OF USB 2.0 & 3.0 INTERFACE ............................................................. 33
FIGURE 17: PRIMARY MODE TIMING ............................................................................................................ 35
FIGURE 18: AUXILIARY MODE TIMING .......................................................................................................... 35
FIGURE 19: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 36
FIGURE 20: WWAN_LED# SIGNAL REFERENCE CIRCUIT DIAGRAM ........................................................ 38
FIGURE 21: WAKE_ON_WAN# BEHAVIOR .................................................................................................... 39
FIGURE 22: WAKE_ON_WAN# SIGNAL REFERENCE CIRCUIT DESIGN .................................................... 39
FIGURE 23: ANTENNA INTERFACES ON THE MODULE .............................................................................. 43
FIGURE 24: EM12 RF CONNECTOR DIMENSIONS (UNIT: MM) ................................................................... 47
FIGURE 25: SPECIFICATIONS OF MATING PLUGS USING Ø0.81MM COAXIAL CABLES ......................... 48
FIGURE 26: CONNECTION BETWEEN RF CONNECTOR AND MATING PLUG USING Ø0.81MM COAXIAL
CABLE ....................................................................................................................................................... 48
FIGURE 27: CONNECTION BETWEEN RF CONNECTOR AND MATING PLUG USING Ø1.13MM COAXIAL
CABLE ....................................................................................................................................................... 49
FIGURE 28: THERMAL DISSIPATION AREA ON BOTTOM SIDE OF MODULE (TOP VIEW) ....................... 55
FIGURE 29: MECHANICAL DIMENSIONS OF EM12 (UNIT: MM) ................................................................... 56
FIGURE 30: STANDARD DIMENSIONS OF M.2 TYPE 3042-S3 (UNIT: MM) ................................................. 57
FIGURE 31: M.2 NOMENCLATURE ................................................................................................................. 57
FIGURE 32: TOP VIEW OF THE MODULE ...................................................................................................... 58
FIGURE 33: TRAY SIZE .................................................................................................................................... 59
FIGURE 34: TRAY PACKAGING PROCEDURE .............................................................................................. 60