M10 Hardware Design
Contents
Contents ............................................................................................................................................2
0 Revision history...........................................................................................................................7
1 Introduction ..................................................................................................................................8
1.1 Related documents ...............................................................................................................8
1.2 Terms and abbreviations.......................................................................................................9
1.3 Safety caution.....................................................................................................................11
2 Product concept ........................................................................................................................13
2.1 Key features .......................................................................................................................13
2.2 Functional diagram.............................................................................................................15
2.3 Evaluation board ................................................................................................................16
3 Application interface .................................................................................................................17
3.1 Pin description....................................................................................................................17
3.2 Operating modes ................................................................................................................20
3.3 Power supply ......................................................................................................................21
3.3.1 Power supply pins ....................................................................................................23
3.3.2 Minimizing power losses..........................................................................................23
3.3.3 Monitoring power supply .........................................................................................23
3.4 Power up and power down scenarios .................................................................................24
3.4.1 Turn on .....................................................................................................................24
3.4.2 Turn off.....................................................................................................................26
3.4.3 Restart module using the PWRKEY pin...................................................................29
3.5 Power saving ......................................................................................................................30
3.5.1 Minimum functionality mode...................................................................................30
3.5.2 SLEEP mode (slow clock mode)..............................................................................31
3.5.3 Wake up module from SLEEP mode .......................................................................31
3.6 Summary of state transitions (except SLEEP mode)..........................................................31
3.7 RTC backup .......................................................................................................................32
3.8 Serial interfaces..................................................................................................................33
3.8.1 Function of serial port & debug port supporting ......................................................35
3.8.2 Software upgrade and software debug......................................................................36
3.9 Audio interfaces..................................................................................................................38
3.9.1 Microphone interfaces configuration........................................................................40
3.9.2 Speaker interface configuration................................................................................41
3.9.3 Earphone interface configuration .............................................................................43
3.10 Buzzer ..............................................................................................................................44
3.11 SIM card interface ............................................................................................................45
3.11.1 SIM card application ..............................................................................................45
3.11.2 Design considerations for SIM card holder............................................................46
3.12 LCD interface...................................................................................................................48
3.13 Keypad interface ..............................................................................................................49
3.14 ADC..................................................................................................................................50
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