Product Info

LTE Module Series
EG61-NA Hardware Design
EG61-NA_Hardware_Design 6 / 77
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 17
FIGURE 2: PIN ASSIGNMENT (TOP VIEW) .................................................................................................... 19
FIGURE 3: SLEEP MODE APPLICATION VIA UART ....................................................................................... 28
FIGURE 4: SLEEP MODE APPLICATION WITH USB REMOTE WAKEUP .................................................... 29
FIGURE 5: SLEEP MODE APPLICATION WITH RI ......................................................................................... 29
FIGURE 6: SLEEP MODE APPLICATION WITHOUT SUSPEND FUNCTION ................................................ 30
FIGURE 7: POWER SUPPLY LIMITS DURING BURST TRANSMISSION ...................................................... 32
FIGURE 8: STAR STRUCTURE OF THE POWER SUPPLY ............................................................................ 32
FIGURE 9: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 33
FIGURE 10: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................. 34
FIGURE 11: TURN ON THE MODULE USING BUTTON ................................................................................. 34
FIGURE 12: TIMING OF TURNING ON MODULE ........................................................................................... 35
FIGURE 13: TIMING OF TURNING OFF MODULE ......................................................................................... 36
FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 37
FIGURE 15: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 37
FIGURE 16: TIMING OF RESETTING MODULE ............................................................................................. 38
FIGURE 17: REFERENCE CIRCUIT OF (U)SIM INTERFACE WITH AN 8-PIN (U)SIM CARD CONNECTOR
................................................................................................................................................................... 39
FIGURE 18: REFERENCE CIRCUIT OF (U)SIM INTERFACE WITH A 6-PIN (U)SIM CARD CONNECTOR . 40
FIGURE 19: REFERENCE CIRCUIT OF USB INTERFACE ............................................................................ 41
FIGURE 20: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 44
FIGURE 21: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 44
FIGURE 22: PRIMARY MODE TIMING ............................................................................................................ 45
FIGURE 23: AUXILIARY MODE TIMING .......................................................................................................... 46
FIGURE 24: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 47
FIGURE 25: REFERENCE CIRCUIT OF SPI INTERFACE WITH PERIPHERALS ......................................... 48
FIGURE 26: REFERENCE CIRCUIT OF THE NETWORK STATUS INDICATOR ........................................... 49
FIGURE 27: REFERENCE CIRCUITS OF STATUS ......................................................................................... 49
FIGURE 28: REFERENCE CIRCUIT OF USB_BOOT INTERFACE ................................................................ 51
FIGURE 29: TIMING SEQUENCE FOR ENTERING INTO EMERGENCY DOWNLOAD MODE .................... 51
FIGURE 30: REFERENCE CIRCUIT OF RF ANTENNA INTERFACE ............................................................. 55
FIGURE 31: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ...................................................................... 56
FIGURE 32: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB .................................................. 56
FIGURE 33: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND) .......................................................................................................................................................... 57
FIGURE 34: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE
GROUND) .......................................................................................................................................................... 57
FIGURE 35: REFERENCE CIRCUIT OF GNSS ANTENNA ............................................................................. 58
FIGURE 36: DIMENSIONS OF THE U.FL-R-SMT CONNECTOR (UNIT: MM) ................................................ 60
FIGURE 37: MECHANICALS OF U.FL-LP CONNECTORS ............................................................................. 60
FIGURE 38: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 61