Quectel SC262R Series User Manual

Smart Module Series
SC200R&SC262R_Series_Hardware_Design 10 / 124
Figure Index
Figure 1: Functional Diagram ..................................................................................................................... 23
Figure 2: Pin Assignment (Top View) ......................................................................................................... 25
Figure 3: Voltage Drop Sample .................................................................................................................. 40
Figure 4: Star Structure of the Power Supply ............................................................................................ 41
Figure 5: Reference Circuit of Power Supply ............................................................................................. 41
Figure 6: Turn on the Module Using Driving Circuit ................................................................................... 42
Figure 7: Turn on the Module Using Keystroke ......................................................................................... 43
Figure 8: Timing of Turning on the Module ................................................................................................ 43
Figure 9: Timing of Turning off the Module ................................................................................................ 44
Figure 10: RTC Powered by Coin Cell ....................................................................................................... 45
Figure 11: Reference Design for Battery Charging Circuit ........................................................................ 47
Figure 12: USB Interface Reference Design (OTG Not Supported) .......................................................... 48
Figure 13: USB Interface Reference Design (OTG Supported) ................................................................ 49
Figure 14: Reference Circuit with Level Translator Chip (for UART5) ....................................................... 50
Figure 15: RS-232 Level Match Circuit (for UART5) ................................................................................. 51
Figure 16: Reference Circuit for (U)SIM Interface with an 8-pin (U)SIM Card Connector ........................ 52
Figure 17: Reference Circuit for (U)SIM Interface with a 6-pin (U)SIM Card Connector .......................... 53
Figure 18: Reference Circuit for SD Card Interface ................................................................................... 54
Figure 19: Reference Circuit for Motor Connection ................................................................................... 61
Figure 20: Reference Circuit Design for LCM Interface ............................................................................. 62
Figure 21: Reference Design for External Backlight Driving Circuit .......................................................... 63
Figure 22: Reference Circuit Design for TP Interface ................................................................................ 64
Figure 23: Reference Circuit Design for 3-Camera Applications ............................................................... 67
Figure 24: Reference Circuit Design for ECM Microphone Interface ........................................................ 71
Figure 25: Reference Circuit Design for MEMS Microphone Interface ..................................................... 72
Figure 26: Reference Circuit Design for Earpiece Interface ...................................................................... 72
Figure 27: Reference Circuit Design for Headphone Interface ................................................................. 73
Figure 28: Reference Circuit Design for Loudspeaker Interface ............................................................... 73
Figure 29: Reference Circuit Design for Emergency Download Interface ................................................. 74
Figure 30: Reference Circuit Design for Main and Rx-diversity Antenna Interfaces ................................. 85
Figure 31: Reference Circuit Design for Wi-Fi/Bluetooth Antenna ............................................................ 86
Figure 32: Reference Circuit Design for GNSS Passive Antenna ............................................................. 87
Figure 33: Reference Circuit Design for GNSS Active Antenna ................................................................ 87
Figure 34: Microstrip Design on a 2-layer PCB ......................................................................................... 88
Figure 35: Coplanar Waveguide Design on a 2-layer PCB ....................................................................... 88
Figure 36: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) .................... 89
Figure 37: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) .................... 89
Figure 38: Dimensions of the U.FL-R-SMT Connector (Unit: mm) ............................................................ 91
Figure 39: Mechanicals of U.FL-LP Connectors ........................................................................................ 92
Figure 40: Space Factor of Mated Connectors (Unit: mm) ........................................................................ 92
Figure 41: Top and Side Dimensions ........................................................................................................ 111

Quectel SC262R Series Specifications

General

Brand	Quectel
Model	SC262R Series
Category	Control Unit
Language	English