Quectel EG21-G, Hardware Design

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LTE Module Series
EG21-G Hardware Design
EG21-G_Hardware_Design 5 / 100
Table Index
TABLE 1: FREQUENCY BANDS OF EG21-G MODULE ................................................................................... 11
TABLE 2: KEY FEATURES OF EG21-G MODULE ........................................................................................... 12
TABLE 3: I/O PARAMETERS DEFINITION ....................................................................................................... 18
TABLE 4: PIN DESCRIPTION ........................................................................................................................... 18
TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 27
TABLE 6: VBAT AND GND PINS ....................................................................................................................... 31
TABLE 7: PIN DEFINITION OF PWRKEY ........................................................................................................ 34
TABLE 8: RESET_N PIN DESCRIPTION ......................................................................................................... 37
TABLE 9: PIN DEFINITION OF (U)SIM INTERFACE ....................................................................................... 38
TABLE 10: PIN DESCRIPTION OF USB INTERFACE ..................................................................................... 40
TABLE 11: PIN DEFINITION OF MAIN UART INTERFACE ............................................................................. 42
TABLE 12: PIN DEFINITION OF DEBUG UART INTERFACE ......................................................................... 42
TABLE 13: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 43
TABLE 14: PIN DEFINITION OF PCM AND I2C INTERFACES ....................................................................... 45
TABLE 15: PIN DEFINITION OF SD CARD INTERFACE ................................................................................ 47
TABLE 18: PIN DEFINITION OF ADC INTERFACES ....................................................................................... 48
TABLE 19: CHARACTERISTIC OF ADC .......................................................................................................... 49
TABLE 20: PIN DEFINITION OF NETWORK CONNECTION STATUS/ACTIVITY INDICATOR ...................... 49
TABLE 21: WORKING STATE OF THE NETWORK CONNECTION STATUS/ACTIVITY INDICATOR ........... 49
TABLE 22: PIN DEFINITION OF STATUS ........................................................................................................ 50
TABLE 23: BEHAVIORS OF RI ......................................................................................................................... 51
TABLE 24: PIN DEFINITION OF USB_BOOT INTERFACE ............................................................................. 52
TABLE 25: GNSS PERFORMANCE ................................................................................................................. 54
TABLE 26: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 56
TABLE 27: MODULE OPERATING FREQUENCIES ........................................................................................ 56
TABLE 28: PIN DEFINITION OF GNSS ANTENNA INTERFACE ..................................................................... 60
TABLE 29: GNSS FREQUENCY ....................................................................................................................... 61
TABLE 30: ANTENNA REQUIREMENTS .......................................................................................................... 62
TABLE 31: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 65
TABLE 32: THE MODULE POWER SUPPLY RATINGS .................................................................................. 66
TABLE 33: OPERATION AND STORAGE TEMPERATURES .......................................................................... 66
TABLE 34: EG21-G CURRENT CONSUMPTION ............................................................................................. 67
TABLE 35: GNSS CURRENT CONSUMPTION OF EG21-G MODULE ........................................................... 71
TABLE 36: RF OUTPUT POWER ..................................................................................................................... 72
TABLE 37: EG21-G CONDUCTED RF RECEIVING SENSITIVITY ................................................................. 72
TABLE 38: ELECTROSTATICS DISCHARGE CHARACTERISTICS (25ºC, 45% RELATIVE HUMIDITY) ...... 74
TABLE 39: RECOMMENDED THERMAL PROFILE PARAMETERS ............................................................... 82
TABLE 40: RELATED DOCUMENTS ................................................................................................................ 85
TABLE 41: TERMS AND ABBREVIATIONS ...................................................................................................... 85
TABLE 42: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 89
TABLE 43: GPRS MULTI-SLOT CLASSES ...................................................................................................... 90