Quectel M12 User Manual

M12 Hardware Design
M12_Hardware_Design_V3.3 - 5 -
Figure Index
FIGURE 1: MODULE FUNCTIONAL DIAGRAM ...................................................................... 16
FIGURE 2: TOP VIEW OF MODULE PIN ASSIGNMENT ......................................................... 18
FIGURE 3: VOLTAGE RIPPLE DURING TRANSMITTING ..................................................... 25
FIGURE 4: REFERENCE CIRCUIT FOR THE VBAT INPUT .................................................... 26
FIGURE 5: REFERENCE CIRCUIT FOR POWER SUPPLY ...................................................... 26
FIGURE 6: TURN ON THE MODULE USING DRIVING CIRCUIT ......................................... 28
FIGURE 7: TURN ON THE MODULE USING KEYSTROKE ................................................... 28
FIGURE 8: TIMING OF TURNING ON SYSTEM ...................................................................... 29
FIGURE 9: TIMING OF TURNING OFF THE MODULE ........................................................... 30
FIGURE 10: REFERENCE CIRCUIT FOR EMERG_OFF BY USING DRIVING CIRCUIT .... 32
FIGURE 11: REFERENCE CIRCUIT FOR EMERG_OFF BY USING BUTTON ...................... 32
FIGURE 12: TIMING OF RESTARTING SYSTEM ..................................................................... 33
FIGURE 13: TIMING OF RESTARTING SYSTEM AFTER EMERGENCY SHUTDOWN ...... 33
FIGURE 14: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ........................................ 35
FIGURE 15: RTC SUPPLY FROM RECHARGEABLE BATTERY ............................................ 36
FIGURE 16: RTC SUPPLY FROM CAPACITOR ......................................................................... 36
FIGURE 17: SEIKO XH414H-IV01E CHARGE CHARACTERISTIC ....................................... 37
FIGURE 18: CONNECTION OF ALL FUNCTIONAL UART PORT .......................................... 40
FIGURE 19: CONNECTION OF THREE LINES UART PORT ................................................... 40
FIGURE 20: CONNECTION OF UART PORT WITH HARDWARE FLOW CONTROL .......... 41
FIGURE 21: CONNECTION OF FIRMWARE UPGRADE ......................................................... 41
FIGURE 22: CONNECTION OF DEBUG PORT ......................................................................... 42
FIGURE 23: CONNECTION OF UART3 PORT ........................................................................... 43
FIGURE 24: 3.3V LEVEL MATCH CIRCUIT .............................................................................. 43
FIGURE 25: 5V LEVEL MATCH CIRCUIT ................................................................................. 44
FIGURE 26: RS232 LEVEL MATCH CIRCUIT ........................................................................... 45
FIGURE 27: MICROPHONE REFERENCE DESIGN FOR AIN1&AIN2 ................................... 47
FIGURE 28: REFERENCE DESIGN FOR AOUT1 ...................................................................... 47
FIGURE 29: REFERENCE DESIGN WITH AN AMPLIFIER FOR AOUT1 ............................... 48
FIGURE 30: REFERENCE DESIGN FOR AOUT2 ...................................................................... 48
FIGURE 31: REFERENCE DESIGN WITH AN AMPLIFIER FOR AOUT2 ............................... 49
FIGURE 32: REFERENCE DESIGN FOR AN EARPHONE ....................................................... 49
FIGURE 33: REFERENCE CIRCUIT OF THE 8 PINS SIM CARD ............................................ 51
FIGURE 34: REFERENCE CIRCUIT OF THE 6 PINS SIM CARD ............................................ 52
FIGURE 35: AMPHENOL C707 10M006 512 2 SIM CARD HOLDER ...................................... 53
FIGURE 36: MOLEX 91288 SIM CARD HOLDER ..................................................................... 54
FIGURE 37: RI BEHAVIOUR OF VOICE CALLING AS A RECEIVER .................................... 56
FIGURE 38: RI BEHAVIOUR OF DATA CALLING AS A RECEIVER ...................................... 56
FIGURE 39: RI BEHAVIOUR AS A CALLER ............................................................................. 56
FIGURE 40: RI BEHAVIOUR OF URC OR SMS RECEIVED .................................................... 57
FIGURE 41: REFERENCE CIRCUIT OF THE NETLIGHT ........................................................ 57
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Quectel M12 Specifications

General

Brand	Quectel
Model	M12
Category	Control Unit
Language	English