Quectel BC66, Проектирование аппаратного обеспечения

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NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 6 / 57
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 12
FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 14
FIGURE 3: MODULE POWER CONSUMPTION IN DIFFERENT MODES ...................................................... 19
FIGURE 4: TIMING OF WAKING UP MODULE FROM PSM ........................................................................... 20
FIGURE 5: REFERENCE CIRCUIT FOR POWER SUPPLY ............................................................................ 21
FIGURE 6: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 22
FIGURE 7: TURN ON THE MODULE USING KEYSTROKE ........................................................................... 22
FIGURE 8: POWER UP TIMING ....................................................................................................................... 22
FIGURE 9: POWER DOWN TIMING (POWER OFF BY AT COMMAND) ........................................................ 23
FIGURE 10: POWER DOWN TIMING (POWER OFF BY DISCONNECTING VBAT) ...................................... 23
FIGURE 11: REFERENCE CIRCUIT OF RESET BY USING DRIVING CIRCUIT ........................................... 24
FIGURE 12: REFERENCE CIRCUIT OF RESET BY USING BUTTON ........................................................... 24
FIGURE 13: RESET TIMING ............................................................................................................................. 25
FIGURE 14: REFERENCE DESIGN FOR MAIN UART PORT......................................................................... 26
FIGURE 15: REFERENCE DESIGN OF DEBUG UART PORT ....................................................................... 27
FIGURE 16: REFERENCE DESIGN OF AUXILIARY UART PORT .................................................................. 27
FIGURE 17: REFERENCE CIRCUIT WITH VOLTAGE LEVEL TRANSLATOR CHIP ...................................... 28
FIGURE 18: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 28
FIGURE 19: SKETCH MAP FOR RS-232 INTERFACE MATCH ...................................................................... 29
FIGURE 20: SPI INTERFACE REFERENCE CIRCUIT WITH TRANSLATOR CHIP ....................................... 30
FIGURE 21: REFERENCE CIRCUIT FOR USIM INTERFACE WITH A 6-PIN USIM CARD CONNECTOR ... 31
FIGURE 22: REFERENCE DESIGN FOR NETLIGHT ..................................................................................... 33
FIGURE 23: REFERENCE DESIGN OF NB-IOT ANTENNA INTERFACE ...................................................... 36
FIGURE 24: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ...................................................................... 36
FIGURE 25: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB .................................................. 37
FIGURE 26: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND) .................................................................................................................................................. 37
FIGURE 27: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE
GROUND) .................................................................................................................................................. 37
FIGURE 28: DIMENSIONS OF THE U.FL-R-SMT CONNECTOR (UNIT: MM) ................................................ 41
FIGURE 29: MECHANICALS OF U.FL-LP CONNECTORS ............................................................................. 41
FIGURE 30: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 42
FIGURE 31: TOP VIEW OF THE MODULE ...................................................................................................... 50
FIGURE 32: BOTTOM VIEW OF THE MODULE .............................................................................................. 50
FIGURE 33: TAPE DIMENSIONS (UNIT: MM) .................................................................................................. 54
FIGURE 34: REEL DIMENSIONS (UNIT: MM) ................................................................................................. 54