Product Info

LPWA Module Series
BC66-NA Hardware Design
BC66-NA_Hardware_Design 6 / 59
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 16
FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 18
FIGURE 3: MODULE OPERATING MODES .................................................................................................... 23
FIGURE 4: MODULE POWER CONSUMPTION IN DIFFERENT MODES ...................................................... 24
FIGURE 5: TIMING OF WAKING UP MODULE FROM PSM ........................................................................... 25
FIGURE 6: REFERENCE CIRCUIT FOR POWER SUPPLY ............................................................................ 26
FIGURE 7: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 27
FIGURE 8: TURN ON THE MODULE USING KEYSTROKE ........................................................................... 27
FIGURE 9: POWER UP TIMING ....................................................................................................................... 27
FIGURE 10: POWER DOWN TIMING (POWER OFF BY AT COMMAND) ...................................................... 28
FIGURE 11: POWER DOWN TIMING (POWER OFF BY DISCONNECTING VBAT) ...................................... 28
FIGURE 12: REFERENCE CIRCUIT OF RESET BY USING DRIVING CIRCUIT ........................................... 29
FIGURE 13: REFERENCE CIRCUIT OF RESET BY USING BUTTON ........................................................... 29
FIGURE 14: RESET TIMING ............................................................................................................................. 30
FIGURE 15: USB INTERFACE REFERENCE DESIGN ................................................................................... 31
FIGURE 16: REFERENCE DESIGN FOR MAIN UART PORT ........................................................................ 33
FIGURE 17: REFERENCE DESIGN OF DEBUG UART PORT ....................................................................... 33
FIGURE 18: REFERENCE DESIGN OF AUXILIARY UART PORT .................................................................. 34
FIGURE 19: REFERENCE CIRCUIT WITH VOLTAGE LEVEL TRANSLATOR CHIP ...................................... 34
FIGURE 20: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 35
FIGURE 21: SKETCH MAP FOR RS-232 INTERFACE MATCH ...................................................................... 35
FIGURE 22: REFERENCE CIRCUIT FOR USIM INTERFACE WITH A 6-PIN USIM CARD CONNECTOR ... 37
FIGURE 23: BEHAVIORS OF RI WHEN A URC OR SMS MESSAGE IS RECEIVED ..................................... 39
FIGURE 24: REFERENCE DESIGN OF NETLIGHT ........................................................................................ 39
FIGURE 25: REFERENCE DESIGN OF NB-IOT ANTENNA INTERFACE ...................................................... 42
FIGURE 26: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ...................................................................... 42
FIGURE 27: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB .................................................. 43
FIGURE 28: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND) .................................................................................................................................................. 43

FIGURE 29: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE
GROUND) .................................................................................................................................................. 43

FIGURE 30: DIMENSIONS OF THE U.FL-R-SMT CONNECTOR (UNIT: MM) ................................................ 47
FIGURE 31: MECHANICALS OF U.FL-LP CONNECTORS ............................................................................. 47
FIGURE 32: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 48
FIGURE 33: TOP VIEW OF THE MODULE ...................................................................................................... 56
FIGURE 34: BOTTOM VIEW OF THE MODULE .............................................................................................. 56
FIGURE 35: TAPE DIMENSIONS (UNIT: MM) .................................................................................................. 60
FIGURE 36: REEL DIMENSIONS (UNIT: MM) ................................................................................................. 60