Quectel EC200U Series Hardware Design page 11

LTE Standard Module Series
Figure Index
Figure 1: Functional Diagram ..................................................................................................................... 13
Figure 2: Pin Assignment (Top View) ......................................................................................................... 15
Figure 3: Sleep Mode Application via UART .............................................................................................. 27
Figure 4: Sleep Mode Application with USB Remote Wakeup .................................................................. 28
Figure 5: Sleep Mode Application with MAIN_RI ....................................................................................... 29
Figure 6: Sleep Mode Application without Suspended Function ............................................................... 30
Figure 7: Power Supply Limits during Burst Transmission ........................................................................ 31
Figure 8: Star Configuration Routing of Power Supply .............................................................................. 32
Figure 9: Reference Circuit of Power Supply ............................................................................................. 33
Figure 10: Turn on Module by Using Driving Circuit .................................................................................. 34
Figure 11: Turn on Module by Using Button............................................................................................... 34
Figure 12: Power-up Timing ....................................................................................................................... 35
Figure 13: Power-down Timing .................................................................................................................. 36
Figure 14: Reference Circuit of RESET_N by Using Driving Circuit ......................................................... 37
Figure 15: Reference Circuit of RESET_N by Using Button...................................................................... 37
Figure 16: Timing of Resetting Module ...................................................................................................... 38
Figure 17: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector ......................... 39
Figure 18: Reference Circuit of (U)SIM Interface with a 6-Pin (U)SIM Card Connector ........................... 40
Figure 19: Reference Circuit of USB Application ....................................................................................... 41
Figure 20: Reference Circuit with Translator Chip ..................................................................................... 43
Figure 21: Reference Circuit with Transistor Circuit .................................................................................. 44
Figure 22: Reference Circuit of I2C and PCM Application with External Codec Chip ............................... 46
Figure 23: Reference Circuit of Microphone Interface ............................................................................... 48
Figure 24: Reference Circuit of Loudspeaker Interface ............................................................................. 48
Figure 25: Reference Circuit of SD Card Interface .................................................................................... 51
Figure 26: Reference Circuit of Network Indicator ..................................................................................... 54
Figure 27: Reference Circuit of STATUS ................................................................................................... 55
Figure 28: Reference Circuit of USB_BOOT Interface .............................................................................. 57
Figure 29: Reference Circuit of RF Antenna Interfaces ............................................................................. 61
Figure 30: Reference Circuit of GNSS Antenna ........................................................................................ 62
Figure 31: Microstrip Design on a 2-layer PCB ......................................................................................... 63
Figure 32: Coplanar Waveguide Design on a 2-layer PCB ....................................................................... 63
Figure 33: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) .................... 64
Figure 34: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) .................... 64
Figure 35: Dimensions of U.FL-R-SMT Connector (Unit: mm) .................................................................. 66
Figure 36: Mechanicals of U.FL-LP Connectors ........................................................................................ 66
Figure 37: Space Factor of Mated Connector (Unit: mm) .......................................................................... 67
Figure 38: Module Top and Side Dimensions ............................................................................................ 83
Figure 39: Module Bottom Dimensions ...................................................................................................... 84
Figure 40: Recommended Footprint (Top View) ........................................................................................ 85
Figure 41: Top & Bottom View of the Module ............................................................................................. 86
EC200U_Series_Hardware_Design 6 / 94