LTE Standard Module Series
EC200T Series Hardware Design
EC200T_Series_Hardware_Design 7 / 90
Figure Index
Figure 2: EC200T Series Module Pin Assignment (Top View) ................................................................. 20
Figure 3: Sleep Mode Application via UART ............................................................................................ 30
Figure 4: Sleep Mode Application with USB Remote Wakeup ................................................................. 31
Figure 5: Sleep Mode Application with MAIN_RI ..................................................................................... 31
Figure 6: Sleep Mode Application without Suspend Function .................................................................. 32
Figure 7: Power Supply Limits during Burst Transmission ...................................................................... 34
Figure 8: Star Structure of Power Supply ................................................................................................ 34
Figure 9: Reference Circuit of Power Supply .......................................................................................... 35
Figure 10: Reference Circuit of Turing on the Module Using Driving Circuit ............................................ 36
Figure 11: Reference Circuit of Turing on the Module Using Keystroke .................................................. 36
Figure 12: Timing of Turning on Module .................................................................................................. 37
Figure 13: Timing of Turning off Module .................................................................................................. 38
Figure 14: Reference Circuit of Resetting the Module by Using Driving Circuit ....................................... 39
Figure 15: Reference Circuit of Resetting the Module by Using Keystroke ............................................. 39
Figure 16: Timing of Resetting Module .................................................................................................... 40
Figure 17: Reference Circuit of (U)SIM Interface with an 8-pin (U)SIM Card Connector ......................... 41
Figure 18: Reference Circuit of (U)SIM Interface with a 6-pin (U)SIM Card Connector ........................... 42
Figure 19: Reference Circuit of USB Application ..................................................................................... 43
Figure 20: Reference Circuit with Translator Chip ................................................................................... 46
Figure 21: Reference Circuit with Transistor Circuit ................................................................................ 46
Figure 22: Primary Mode Timing ............................................................................................................. 47
Figure 23: Reference Circuit of PCM Application with Audio Codec ........................................................ 48
Figure 24: Reference Circuit of SD Card Interface .................................................................................. 50
Figure 25: Reference Circuit of Network Status Indication ...................................................................... 54
Figure 26: Reference Circuits of STATUS ............................................................................................... 54
Figure 27: Reference Circuit of FORCE_USB_BOOT Interface .............................................................. 56
Figure 28: Timing Sequence for Entering Emergency Download Mode .................................................. 56
Figure 29: Reference Circuit of RF Antenna Interface ............................................................................. 61
Figure 30: Microstrip Design on a 2-layer PCB ....................................................................................... 62
Figure 31: Coplanar Waveguide Design on a 2-layer PCB ...................................................................... 62
Figure 32: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) ................... 62
Figure 33: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) ................... 63
Figure 34: Dimensions of U.FL-R-SMT Connector (Unit: mm) ................................................................ 64
Figure 35: Mechanicals of U.FL-LP Connectors ...................................................................................... 65
Figure 36: Space Factor of Mated Connector (Unit: mm) ........................................................................ 65
Figure 37: Module Top and Side Dimensions .......................................................................................... 85
Figure 38: Module Bottom Dimensions (Bottom View) ............................................................................ 86
Figure 39: Recommended Footprint (Top View) ...................................................................................... 87
Figure 40: Top View of the Module .......................................................................................................... 88
Figure 41: Bottom View of the Module .................................................................................................... 88
Figure 42: Recommended Reflow Soldering Thermal Profile .................................................................. 90
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