Quectel UC20 Hardware Design

UMTS/HSPA Module Series
UC20 Hardware Design
UC20_Hardware_Design Confidential / Released 7 / 82
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 15
FIGURE 2: PIN ASSIGNMENT (TOP VIEW) .................................................................................................... 17
FIGURE 3: UART SLEEP APPLICATION ......................................................................................................... 25
FIGURE 4: USB APPLICATION WITH SUSPEND FUNCTION ........................................................................ 26
FIGURE 5: USB SLEEP APPLICATION WITHOUT SUSPEND FUNCTION .................................................... 27
FIGURE 6: VOLTAGE DROP DURING TRANSMITTING BURST .................................................................... 29
FIGURE 7: STAR STRUCTURE OF THE POWER SUPPLY............................................................................ 29
FIGURE 8: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 30
FIGURE 9: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 31
FIGURE 10: TURN ON THE MODULE USING KEYSTROKE ......................................................................... 31
FIGURE 11: TIMING OF TURNING ON MODULE ........................................................................................... 32
FIGURE 12: TIMING OF TURNING OFF MODULE ......................................................................................... 33
FIGURE 13: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 35
FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 35
FIGURE 15: TIMING OF RESETTING MODULE ............................................................................................. 35
FIGURE 16: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ................................................................ 36
FIGURE 17: RTC SUPPLY FROM RECHARGEABLE BATTERY .................................................................... 36
FIGURE 18: RTC SUPPLY FROM CAPACITOR .............................................................................................. 37
FIGURE 19: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 39
FIGURE 20: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 39
FIGURE 21: RS232 LEVEL MATCH CIRCUIT .................................................................................................. 40
FIGURE 22: REFERENCE CIRCUIT OF THE 8 PIN USIM CARD ................................................................... 41
FIGURE 23: REFERENCE CIRCUIT OF THE 6 PIN USIM CARD ................................................................... 42
FIGURE 24: REFERENCE CIRCUIT OF USB APPLICATION ......................................................................... 43
FIGURE 25: TEST POINTS OF FIRMWARE UPGRADE ................................................................................. 44
FIGURE 26: PRIMARY MODE TIMING ............................................................................................................ 45
FIGURE 27: AUXILIARY MODE TIMING .......................................................................................................... 45
FIGURE 28: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 46
FIGURE 29: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .......................................................... 48
FIGURE 30: REFERENCE CIRCUIT OF THE STATUS ................................................................................... 49
FIGURE 31: REFERENCE CIRCUIT OF THE SLEEP_IND ............................................................................. 50
FIGURE 32: RELATIONSHIP BETWEEN SLEEP AND NETWORK PAGING .................................................. 50
FIGURE 33: REFERENCE CIRCUIT OF ANTENNA INTERFACE ................................................................... 56
FIGURE 34: REFERENCE CIRCUIT OF GNSS PASSIVE ANTENNA ............................................................. 57
FIGURE 35: REFERENCE CIRCUIT OF GNSS ACTIVE ANTENNA ............................................................... 58
FIGURE 36: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ................................................ 59
FIGURE 37: MECHANICALS OF UF.L-LP CONNECTORS ............................................................................. 60
FIGURE 38: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 60
FIGURE 39: UC20 TOP AND SIDE DIMENSIONS ........................................................................................... 68
FIGURE 40: UC20 BOTTOM DIMENSIONS (BOTTOM VIEW) ....................................................................... 69
FIGURE 41: BOTTOM PADS DIMENSIONS (BOTTOM VIEW) ....................................................................... 70
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Quectel UC20 Specifications

General

Brand	Quectel
Model	UC20
Category	Control Unit
Language	English