Quectel BC950N-N1 Hardware Design page 7

Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ........................................................................................................... 12
FIGURE 2: PIN ASSIGNMENT .................................................................................................................... 14
FIGURE 3: MODULE POWER CONSUMPTION IN DIFFERENT MODES ................................................... 21
FIGURE 4: TIMING OF WAKING UP MODULE FROM PSM ........................................................................ 22
FIGURE 5: REFERENCE CIRCUIT FOR POWER SUPPLY ......................................................................... 23
FIGURE 6: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................ 24
FIGURE 7: TURN ON THE MODULE USING KEYSTROKE ........................................................................ 24
FIGURE 8: POWER UP TIMING .................................................................................................................. 25
FIGURE 9: POWER DOWN TIMING (POWER DOWN BY AT COMMAND) .................................................. 25
FIGURE 10: POWER DOWN TIMING (POWER DOWN BY DISCONNECTING VBAT) ................................ 26
FIGURE 11: REFERENCE CIRCUIT OF RESET BY USING DRIVING CIRCUIT.......................................... 26
FIGURE 12: REFERENCE CIRCUIT OF RESET BY USING BUTTON ......................................................... 27
FIGURE 13: RESET TIMING ....................................................................................................................... 27
FIGURE 14: USB INTERFACE REFERENCE DESIGN ................................................................................ 28
FIGURE 15: REFERENCE DESIGN FOR MAIN UART PORT ..................................................................... 30
FIGURE 16: REFERENCE DESIGN OF DEBUG UART PORT .................................................................... 31
FIGURE 17: REFERENCE DESIGN OF AUXILIARY UART PORT ............................................................... 31
FIGURE 18: REFERENCE DESIGN OF BLUETOOTH UART PORT............................................................ 31
FIGURE 19: REFERENCE CIRCUIT WITH VOLTAGE LEVEL TRANSLATOR CHIP .................................... 32
FIGURE 20: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT ........................................................... 32
FIGURE 21: SKETCH MAP FOR RS-232 INTERFACE MATCH ................................................................... 33
FIGURE 22: REFERENCE CIRCUIT FOR USIM INTERFACE WITH A 6-PIN USIM CARD CONNECTOR ... 34
FIGURE 23: BEHAVIORS OF RI WHEN A URC OR SMS MESSAGE IS RECEIVED ................................. 36
FIGURE 24: REFERENCE DESIGN OF NETLIGHT .................................................................................... 37
FIGURE 25: REFERENCE DESIGN OF NB-IOT ANTENNA INTERFACE .................................................... 40
FIGURE 26: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ................................................................... 40
FIGURE 27: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB ................................................ 40
FIGURE 28: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND) .............................................................................................................................. 41
FIGURE 29: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE
GROUND) .............................................................................................................................. 41
FIGURE 30: DIMENSIONS OF THE U.FL-R-SMT CONNECTOR (UNIT: MM) .............................................. 45
FIGURE 31: MECHANICALS OF U.FL-LP CONNECTORS .......................................................................... 45
FIGURE 32: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ......................................................... 46
FIGURE 33: TOP VIEW OF THE MODULE .................................................................................................. 52
FIGURE 34: BOTTOM VIEW OF THE MODULE .......................................................................................... 52
FIGURE 35: TAPE DIMENSIONS (UNIT: MM).............................................................................................. 56
FIGURE 36: REEL DIMENSIONS (UNIT: MM) ............................................................................................. 56
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