Quectel EC21 Mini PCIe Series Hardware Design page 10

LTE Standard Module Series
EC21 Mini PCIe Hardware Design
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 17
FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 18
FIGURE 3: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 24
FIGURE 4: REFERENCE CIRCUIT OF (U)SIM INTERFACE WITH AN 8-PIN (U)SIM CARD CONNECTOR 25
FIGURE 5: REFERENCE CIRCUIT OF (U)SIM INTERFACE WITH A 6-PIN (U)SIM CARD CONNECTOR ... 25
FIGURE 6: REFERENCE CIRCUIT OF USB INTERFACE .............................................................................. 27
FIGURE 7: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 28
FIGURE 8: TIMING IN PRIMARY MODE .......................................................................................................... 30
FIGURE 9: TIMING IN AUXILIARY MODE........................................................................................................ 30
FIGURE 10: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 31
FIGURE 11: RI BEHAVIORS ............................................................................................................................. 32
FIGURE 12: TIMING OF RESETTING MODULE ............................................................................................. 33
FIGURE 13: LED_WWAN# SIGNAL REFERENCE CIRCUIT DIAGRAM ........................................................ 34
FIGURE 14: WAKE# BEHAVIORS .................................................................................................................... 35
FIGURE 15: DIMENSIONS OF THE RECEPTACLE RF CONNECTORS (UNIT: MM) .................................... 40
FIGURE 16: MECHANICALS OF U.FL-LP MATING PLUGS ........................................................................... 41
FIGURE 17: SPACE FACTOR OF MATING PLUGS (UNIT: MM) ..................................................................... 41
FIGURE 18: REFERENCED HEATSINK DESIGN ........................................................................................... 61
FIGURE 19: MECHANICAL DIMENSIONS OF EC21 MINI PCIE .................................................................... 62
FIGURE 20: STANDARD DIMENSIONS OF MINI PCI EXPRESS ................................................................... 63
FIGURE 21: DIMENSIONS OF THE MINI PCI EXPRESS CONNECTOR (MOLEX 679105700) .................... 64
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