User's Manual
LTE Module
EC20 Hardware Design
EC20_Hardware_Design Confidential / Released 6 / 83
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 14
FIGURE 2: PIN ASSIGNMENT (TOP VIEW)..................................................................................................... 16
FIGURE 3: UART SLEEP APPLICATION ......................................................................................................... 23
FIGURE 4: SLEEP APPLICATION WITH USB REMOTE WAKEUP ................................................................ 24
FIGURE 5: SLEEP APPLICATION WITH RI ..................................................................................................... 25
FIGURE 6: SLEEP APPLICATION WITHOUT SUSPEND FUNCTION ............................................................ 26
FIGURE 7: POWER SUPPLY LIMITS DURING TRANSMIT BURST ............................................................... 28
FIGURE 8: STAR STRUCTURE OF THE POWER SUPPLY............................................................................ 28
FIGURE 9: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 29
FIGURE 10: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................. 30
FIGURE 11: TURN ON THE MODULE USING KEYSTROKE .......................................................................... 30
FIGURE 12: TIMING OF TURNING ON MODULE ........................................................................................... 31
FIGURE 13: TIMING OF TURNING OFF MODULE ......................................................................................... 32
FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 33
FIGURE 15: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 33
FIGURE 16: TIMING OF RESETTING MODULE ............................................................................................. 33
FIGURE 17: REFERENCE CIRCUIT OF 8-PIN USIM CONNECTOR .............................................................. 34
FIGURE 18: REFERENCE CIRCUIT OF 6-PIN USIM CONNECTOR .............................................................. 35
FIGURE 19: TEST POINTS FOR FIRMWARE UPGRADE .............................................................................. 36
FIGURE 20: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 39
FIGURE 21: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 39
FIGURE 22: PRIMARY MODE TIMING ............................................................................................................ 40
FIGURE 23: AUXILIARY MODE TIMING .......................................................................................................... 41
FIGURE 24: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 42
FIGURE 25: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .......................................................... 44
FIGURE 26: REFERENCE CIRCUIT OF THE STATUS ................................................................................... 44
FIGURE 27: REFERENCE CIRCUIT OF ANTENNA INTERFACE ................................................................... 50
FIGURE 28: REFERENCE CIRCUIT OF GNSS ANTENNA ............................................................................. 51
FIGURE 29: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ................................................ 53
FIGURE 30: MECHANICALS OF UF.L-LP CONNECTORS ............................................................................. 53
FIGURE 31: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 54
FIGURE 32: MODULE TOP AND SIDE DIMENSIONS ..................................................................................... 60
FIGURE 33: MODULE BOTTOM DIMENSIONS (BOTTOM VIEW) ................................................................. 61
FIGURE 34: BOTTOM PADS DIMENSIONS (BOTTOM VIEW) ....................................................................... 61
FIGURE 35: RECOMMENDED FOOTPRINT (TOP VIEW) .............................................................................. 62
FIGURE 36: RECOMMENDED STENCIL ......................................................................................................... 63
FIGURE 37: RECOMMENDED FOOTPRINT WITH PINS 117~140 ................................................................ 64
FIGURE 38: TOP VIEW OF THE MODULE ...................................................................................................... 65
FIGURE 39: BOTTOM VIEW OF THE MODULE .............................................................................................. 65
FIGURE 40: LIQUIDS TEMPERATURE ............................................................................................................ 67
FIGURE 41: CARRIER TAPE ............................................................................................................................ 68