Product Info

Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 8 / 118
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 24
FIGURE 2: PIN ASSIGNMENT (TOP VIEW)..................................................................................................... 26
FIGURE 3: VOLTAGE DROP SAMPLE ............................................................................................................. 42
FIGURE 4: STRUCTURE OF POWER SUPPLY .............................................................................................. 43
FIGURE 5: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 44
FIGURE 6: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 45
FIGURE 7: TURN ON THE MODULE USING KEYSTROKE ........................................................................... 45
FIGURE 8: AUTOMATIC BOOT REFERENCE CIRCUIT ................................................................................. 46
FIGURE 9: TIMING OF RESTARTING MODULE ............................................................................................. 46
FIGURE 10: RTC POWERED BY RECHARGEABLE BUTTON CELL ............................................................. 47
FIGURE 11: REFERENCE DESIGN FOR BATTERY CHARGING CIRCUIT ................................................... 50
FIGURE 12: USB TYPE-C INTERFACE REFERENCE DESIGN ..................................................................... 53
FIGURE 13: DISPLAY PORT INTERFACES .................................................................................................... 56
FIGURE 14: USB2 HOST ................................................................................................................................. 56
FIGURE 15: REFERENCE CIRCUIT WITH LEVEL TRANSLATOR CHIP (FOR UART6) .............................. 58
FIGURE 16: RS232 LEVEL MATCH CIRCUIT (FOR UART5) .......................................................................... 58
FIGURE 17: REFERENCE CIRCUIT FOR (U)SIM INTERFACE WITH AN 8-PIN (U)SIM CARD CONNECTOR
................................................................................................................................................................... 60
FIGURE 18: REFERENCE CIRCUIT FOR (U)SIM INTERFACE WITH A 6-PIN (U)SIM CARD CONNECTOR
................................................................................................................................................................... 60
FIGURE 19: REFERENCE CIRCUIT FOR SD CARD INTERFACE ................................................................. 62
FIGURE 20: LCM0 EXTERNAL BACKLIGHT DRIVE REFERENCE CIRCUIT ................................................ 69
FIGURE 21: REFERENCE CIRCUIT DESIGN FOR LCM1 INTERFACE ......................................................... 69
FIGURE 22: REFERENCE CIRCUIT DESIGN FOR LCM0 INTERFACE ......................................................... 70
FIGURE 23: REFERENCE CIRCUIT DESIGN FOR LCM1 INTERFACE ......................................................... 71
FIGURE 24: REFERENCE CIRCUIT DESIGN FOR TOUCH PANEL INTERFACES ....................................... 73
FIGURE 25: REFERENCE CIRCUIT DESIGN FOR TWO-CAMERA APPLICATIONS .................................. 76
FIGURE 26: REFERENCE CIRCUIT DESIGN FOR TWO-CAMERA APPLICATIONS .................................... 77
FIGURE 27: REFERENCE CIRCUIT DESIGN FOR THREE-CAMERA APPLICATIONS ................................ 78
FIGURE 28: REFERENCE CIRCUIT DESIGN FOR ANALOG ECM-TYPE MICROPHONE ........................... 83
FIGURE 29: REFERENCE CIRCUIT DESIGN FOR MEMS-TYPE MICROPHONE ........................................ 84
FIGURE 30: REFERENCE CIRCUIT DESIGN FOR EARPIECE IINTERFACE ............................................... 84
FIGURE 31: REFERENCE CIRCUIT DESIGN FOR HEADPHONE INTERFACE ........................................... 85
FIGURE 30: REFERENCE CIRCUIT DESIGN FOR LOUDSPEAKER INTERFACE ....................................... 85
FIGURE 33: REFERENCE CIRCUIT DESIGN FOR EMERGENCY DOWNLOAD INTERFACE ..................... 86
FIGURE 34: REFERENCE CIRCUIT DESIGN FOR MAIN AND RX-DIVERSITY ANTENNA INTERFACES .. 97
FIGURE 33: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ...................................................................... 98
FIGURE 34: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB .................................................. 98
FIGURE 35: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND) .................................................................................................................................................. 98
FIGURE 36: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE