Quectel NB-IoT Module Series, Проектирование аппаратного обеспечения

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NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 6 / 50
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 12
FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 14
FIGURE 3: MODULE POWER CONSUMPTION IN DIFFERENT MODES ...................................................... 19
FIGURE 4: REFERENCE CIRCUIT FOR POWER SUPPLY ............................................................................ 21
FIGURE 5: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 21
FIGURE 6: TURN ON THE MODULE USING KEYSTROKE ........................................................................... 22
FIGURE 7: TURN-ON TIMING .......................................................................................................................... 22
FIGURE 8: TURN-OFF TIMING ........................................................................................................................ 23
FIGURE 9: REFERENCE CIRCUIT OF RESET BY USING DRIVING CIRCUIT ............................................. 23
FIGURE 10: REFERENCE CIRCUIT OF RESET BY USING BUTTON ........................................................... 24
FIGURE 11: RESET TIMING ............................................................................................................................. 24
FIGURE 12: REFERENCE DESIGN FOR MAIN UART PORT......................................................................... 26
FIGURE 13: REFERENCE DESIGN FOR DEBUG UART PORT ..................................................................... 26
FIGURE 14: REFERENCE DESIGN FOR AUXILIARY UART PORT ............................................................... 27
FIGURE 15: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 27
FIGURE 16: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 28
FIGURE 17: SKETCH MAP FOR RS-232 INTERFACE MATCH ...................................................................... 28
FIGURE 18: SPI INTERFACE REFERENCE CIRCUIT WITH TRANSLATOR CHIP ....................................... 29
FIGURE 19: REFERENCE CIRCUIT FOR USIM INTERFACE WITH A 6-PIN USIM CARD CONNECTOR ... 30
FIGURE 20: REFERENCE DESIGN FOR NETLIGHT ..................................................................................... 32
FIGURE 21: REFERENCE DESIGN FOR NB-IOT ANTENNA INTERFACE .................................................... 33
FIGURE 22: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ...................................................................... 35
FIGURE 23: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB .................................................. 35
FIGURE 24: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND) .......................................................................................................................................................... 35
FIGURE 25: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE
GROUND) .......................................................................................................................................................... 36
FIGURE 26: BC66 TOP AND SIDE DIMENSIONS (UNIT: MM) ....................................................................... 41
FIGURE 27: MODULE BOTTOM DIMENSION (BOTTOM VIEW) .................................................................... 42
FIGURE 28: RECOMMENDED FOOTPRINT (UNIT: MM) ................................................................................ 43
FIGURE 29: TOP VIEW OF THE MODULE ...................................................................................................... 44
FIGURE 30: BOTTOM VIEW OF THE MODULE .............................................................................................. 44
FIGURE 31: REFLOW SOLDERING THERMAL PROFILE .............................................................................. 46
FIGURE 32: TAPE DIMENSIONS (UNIT: MM) .................................................................................................. 47
FIGURE 33: REEL DIMENSIONS (UNIT: MM) ................................................................................................. 47