Quectel M66

GSM/GPRS Module Series
M66 Hardware Design
M66_Hardware_Design Confidential / Released 3 / 80
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 6
Figure Index ................................................................................................................................................. 7
1 Introduction .......................................................................................................................................... 9
1.1. Safety Information.................................................................................................................... 10
2 Product Concept ................................................................................................................................ 11
2.1. General Description ................................................................................................................. 11
2.2. Key Features ........................................................................................................................... 12
2.3. Functional Diagram ................................................................................................................. 14
2.4. Evaluation Board ..................................................................................................................... 14
3 Application Interface ......................................................................................................................... 15
3.1. Pin of Module ........................................................................................................................... 16
3.1.1. Pin Assignment .............................................................................................................. 16
3.1.2. Pin Description ............................................................................................................... 17
3.2. Operating Modes ..................................................................................................................... 21
3.3. Power Supply ........................................................................................................................... 22
3.3.1. Power Features of Module ............................................................................................. 22
3.3.2. Decrease Supply Voltage Drop ...................................................................................... 23
3.3.3. Reference Design For Power Supply ............................................................................ 23
3.3.4. Monitor Power Supply .................................................................................................... 24
3.4. Power On and Down Scenarios .............................................................................................. 24
3.4.1. Power On ....................................................................................................................... 24
3.4.2. Power Down ................................................................................................................... 26
3.4.2.1. Power Down Module Using the PWRKEY Pin .................................................. 26
3.4.2.2. Power Down Module Using AT Command ........................................................ 27
3.4.2.3. Under-voltage Automatic Shutdown .................................................................. 28
3.4.3. Restart ............................................................................................................................ 28
3.5. Power Saving ........................................................................................................................... 29
3.5.1. Minimum Functionality Mode ......................................................................................... 29
3.5.2. SLEEP Mode .................................................................................................................. 29
3.5.3. Wake Up Module From SLEEP Mode ........................................................................... 30
3.5.4. Summary of State Transition .......................................................................................... 30
3.6. RTC Backup............................................................................................................................. 30
3.7. Serial Interfaces ....................................................................................................................... 32
3.7.1. UART Port ...................................................................................................................... 34
3.7.1.1. The Feature of UART Port................................................................................. 34
3.7.1.2. The Connection of UART .................................................................................. 35
3.7.1.3. Firmware Upgrade ............................................................................................. 36
3.7.2. Debug Port ..................................................................................................................... 37
Quectel
Confidential