Quectel EC21 Series, Hardware Design

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LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design Confidential / Released 6 / 94
Table Index
TABLE 1: FREQUENCY BANDS OF EC21 SERIES MODULE ........................................................................ 12
TABLE 2: EC21 KEY FEATURES OF EC21 MODULE ..................................................................................... 13
TABLE 3: I/O PARAMETERS DEFINITION ....................................................................................................... 19
TABLE 4: PIN DESCRIPTION ........................................................................................................................... 19
TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 28
TABLE 6: VBAT AND GND PINS ....................................................................................................................... 33
TABLE 7: PWRKEY PIN DESCRIPTION .......................................................................................................... 35
TABLE 8: RESET_N PIN DESCRIPTION ......................................................................................................... 38
TABLE 9: PIN DEFINITION OF THE USIM CARD INTERFACE ...................................................................... 39
TABLE 10: PIN DESCRIPTION OF USB INTERFACE ..................................................................................... 41
TABLE 11: PIN DEFINITION OF THE MAIN UART INTERFACE ..................................................................... 43
TABLE 12: PIN DEFINITION OF THE DEBUG UART INTERFACE ................................................................. 43
TABLE 13: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 44
TABLE 14: PIN DEFINITION OF PCM AND I2C INTERFACES ....................................................................... 46
TABLE 15: PIN DEFINITION OF THE ADC ...................................................................................................... 48
TABLE 16: CHARACTERISTIC OF THE ADC .................................................................................................. 48
TABLE 17: PIN DEFINITION OF NETWORK CONNECTION STATUS/ACTIVITY INDICATOR ...................... 49
TABLE 18: WORKING STATE OF NETWORK CONNECTION STATUS/ACTIVITY INDICATOR ................... 49
TABLE 19: PIN DEFINITION OF STATUS ........................................................................................................ 50
TABLE 20: BEHAVIOR OF THE RI ................................................................................................................... 51
TABLE 21: PIN DEFINITION OF THE SGMII INTERFACE .............................................................................. 52
TABLE 22: PIN DEFINITION OF WIRELESS CONNECTIVITY INTERFACES ................................................ 54
TABLE 23: PIN DEFINITION OF USB_BOOT INTERFACE ............................................................................. 57
TABLE 24: GNSS PERFORMANCE ................................................................................................................. 58
TABLE 25: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 60
TABLE 26: MODULE OPERATING FREQUENCIES ........................................................................................ 60
TABLE 27: PIN DEFINITION OF GNSS ANTENNA INTERFACE ..................................................................... 64
TABLE 28: GNSS FREQUENCY ....................................................................................................................... 64
TABLE 29: ANTENNA REQUIREMENTS .......................................................................................................... 65
TABLE 30: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 68
TABLE 31: POWER SUPPLY RATINGS ........................................................................................................... 68
TABLE 32: OPERATING TEMPERATURE ........................................................................................................ 69
TABLE 33: EC21-A CURRENT CONSUMPTION ............................................................................................. 70
TABLE 34: EC21-AUT CURRENT CONSUMPTION ........................................................................................ 71
TABLE 35: EC21-E CURRENT CONSUMPTION ............................................................................................. 72
TABLE 36: EC21-KL CURRENT CONSUMPTION ........................................................................................... 73
TABLE 37: EC21-V CURRENT CONSUMPTION ............................................................................................. 74
TABLE 38: EC21-AUV CURRENT CONSUMPTION ........................................................................................ 74
TABLE 39: GNSS CURRENT CONSUMPTION OF EC21 SERIES MODULE ................................................. 75
TABLE 40: RF OUTPUT POWER ..................................................................................................................... 76
TABLE 41: EC21-E CONDUCTED RF RECEIVING SENSITIVITY .................................................................. 76
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