Quectel EC20 R2.1, Hardware Design

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LTE Standard Module Series
EC20 R2.1 Mini PCIe Hardware Design
EC20_R2.1_Mini_PCIe_Hardware_Design 6 / 51
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 13
FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 14
FIGURE 3: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 19
FIGURE 4: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 20
FIGURE 5: REFERENCE CIRCUIT OF USB INTERFACE .............................................................................. 22
FIGURE 6: REFERENCE CIRCUIT OF (U)SIM INTERFACE WITH AN 8-PIN (U)SIM CARD CONNECTOR 23
FIGURE 7: R REFERENCE CIRCUIT OF (U)SIM INTERFACE WITH A 6-PIN (U)SIM CARD CONNECTOR 24
FIGURE 8: TIMING IN PRIMARY MODE .......................................................................................................... 25
FIGURE 9: TIMING IN AUXILIARY MODE........................................................................................................ 26
FIGURE 10: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 26
FIGURE 11: RI BEHAVIORS ............................................................................................................................. 27
FIGURE 12: TIMING OF RESETTING MODULE ............................................................................................. 29
FIGURE 13: LED_WWAN# SIGNAL REFERENCE CIRCUIT DIAGRAM ........................................................ 29
FIGURE 14: WAKE# BEHAVIOR ...................................................................................................................... 30
FIGURE 15: DIMENSIONS OF THE RECEPTACLE RF CONNECTORS (UNIT: MM) .................................... 35
FIGURE 16: MECHANICALS OF U.FL-LP MATING PLUGS ........................................................................... 35
FIGURE 17: SPACE FACTOR OF MATING PLUGS (UNIT: MM) ..................................................................... 36
FIGURE 18: REFERENCED HEATSINK DESIGN ........................................................................................... 41
FIGURE 19: MECHANICAL DIMENSIONS OF EC20 R2.1 MINI PCIE ............................................................ 46
FIGURE 20: STANDARD DIMENSIONS OF MINI PCI EXPRESS ................................................................... 47
FIGURE 21: DIMENSIONS OF THE MINI PCI EXPRESS CONNECTOR (MOLEX 679100002) .................... 48