User's Manual

M80 Hardware Design
M80_HD_V1.2 - 3 -
Contents
Contents ............................................................................................................................................ 3
Table Index ........................................................................................................................................ 6
Figure Index ...................................................................................................................................... 7
0. Revision history ............................................................................................................................ 9
1. Introduction ................................................................................................................................. 10
1.1. Related documents ............................................................................................................ 10
1.2. Terms and abbreviations .................................................................................................... 11
1.3. Directives and standards .................................................................................................... 13
1.3.1. FCC Statement ........................................................................................................ 13
1.3.2. FCC/IC Radiation exposure statement .................................................................... 13
1.3.3. Industry Canada license ........................................................................................... 13
1.4. Safety cautions .................................................................................................................. 14
2. Product concept ........................................................................................................................... 16
2.1. Key features ...................................................................................................................... 16
2.2. Functional diagram ............................................................................................................ 18
2.3. Evaluation board ............................................................................................................... 19
3. Application interface ................................................................................................................... 20
3.1. Pin ..................................................................................................................................... 21
3.1.1. Pin assignment ......................................................................................................... 21
3.1.2. Pin description ......................................................................................................... 23
3.2. Operating modes ............................................................................................................... 30
3.3. Power supply ..................................................................................................................... 31
3.3.1. Feature of GSM power ............................................................................................ 31
3.3.2. Minimize supply voltage drop ................................................................................. 31
3.3.3. Reference power design for module ........................................................................ 32
3.3.4. Monitor power supply ............................................................................................. 33
3.4. Power on and down scenarios ........................................................................................... 33
3.4.1. Power on .................................................................................................................. 33
3.4.2. Power down ............................................................................................................. 35
3.4.3. Restart ...................................................................................................................... 38
3.5. Charging interface ............................................................................................................. 40
3.6. Power saving ..................................................................................................................... 40
3.6.1. Minimum functionality mode .................................................................................. 40
3.6.2. SLEEP mode ........................................................................................................... 41
3.6.3. Wake up module from SLEEP mode ...................................................................... 41
3.7. Summary of state transitions ............................................................................................. 41
3.8. RTC backup ....................................................................................................................... 42
3.9. Serial interfaces ................................................................................................................. 43
3.9.1. UART Port .............................................................................................................. 44
3.9.2. Debug Port ............................................................................................................... 48
3.9.3. Auxiliary UART Port .............................................................................................. 48