Quectel UC20 Manual page 8

UMTS/HSPA Module Series
UC20 Hardware Design
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ........................................................................................................ 16
FIGURE 2: PIN ASSIGNMENT (TOP VIEW)............................................................................................. 18
FIGURE 3: UART SLEEP APPLICATION .................................................................................................. 26
FIGURE 4: USB APPLICATION WITH SUSPEND FUNCTION ................................................................ 27
FIGURE 5: USB SLEEP APPLICATION WITHOUT SUSPEND FUNCTION ............................................ 28
FIGURE 6: STAR STRUCTURE OF THE POWER SUPPLY .................................................................... 30
FIGURE 7: REFERENCE CIRCUIT OF POWER SUPPLY ....................................................................... 30
FIGURE 8: TURN ON THE MODULE USING DRIVING CIRCUIT ........................................................... 31
FIGURE 9: TURN ON THE MODULE USING KEYSTROKE .................................................................... 32
FIGURE 10: TIMING OF TURNING ON MODULE ................................................................................... 33
FIGURE 11: TIMING OF TURNING OFF MODULE .................................................................................. 34
FIGURE 12: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT .............................. 36
FIGURE 13: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON .............................................. 36
FIGURE 14: TIMING OF RESETTING MODULE ...................................................................................... 36
FIGURE 15: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ........................................................ 37
FIGURE 16: RTC SUPPLY FROM RECHARGEABLE BATTERY ............................................................ 37
FIGURE 17: RTC SUPPLY FROM CAPACITOR ....................................................................................... 38
FIGURE 18: REFERENCE CIRCUIT WITH TRANSLATOR CHIP............................................................ 40
FIGURE 19: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT ...................................................... 40
FIGURE 20: RS232 LEVEL MATCH CIRCUIT .......................................................................................... 41
FIGURE 21: REFERENCE CIRCUIT OF DEBUG UART WITH LEVEL TRANSLATOR .......................... 41
FIGURE 22: REFERENCE CIRCUIT OF THE 8 PIN USIM CARD ........................................................... 42
FIGURE 23: REFERENCE CIRCUIT OF THE 6 PIN USIM CARD ........................................................... 43
FIGURE 24: MOLEX 91228 USIM CONNECTOR .................................................................................... 44
FIGURE 25: AMPHENOL C707 10M006 512 2 USIM CARD CONNECTOR ........................................... 45
FIGURE 26: REFERENCE CIRCUIT OF USB APPLICATION ................................................................. 46
FIGURE 27: TEST POINTS OF FIRMWARE UPGRADE ......................................................................... 47
FIGURE 28: PRIMARY MODE TIMING ..................................................................................................... 48
FIGURE 29: AUXILIARY MODE TIMING ................................................................................................... 49
FIGURE 30: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC ............................ 50
FIGURE 31: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .................................................. 52
FIGURE 32: REFERENCE CIRCUIT OF THE STATUS............................................................................ 53
FIGURE 33: REFERENCE CIRCUIT OF THE SLEEP_IND ..................................................................... 54
FIGURE 34: REFERENCE CIRCUIT OF ANTENNA INTERFACE ........................................................... 59
FIGURE 35: REFERENCE CIRCUIT OF GNSS PASSIVE ANTENNA ..................................................... 60
FIGURE 36: REFERENCE CIRCUIT OF GNSS ACTIVE ANTENNA ....................................................... 61
FIGURE 37: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ........................................ 62
FIGURE 38: MECHANICALS OF UF.L-LP CONNECTORS ..................................................................... 63
FIGURE 39: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ................................................... 63
FIGURE 40: UC20 TOP AND SIDE DIMENSIONS ................................................................................... 69
FIGURE 41: UC20 BOTTOM DIMENSIONS (BOTTOM VIEW) ................................................................ 70
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