Quectel SG368Z Series

Smart Module Series
SG368Z_Series_Hardware_Design 5 / 113
Contents
Safety Information .................................................................................................................................... 3
About the Document ................................................................................................................................ 4
Contents .................................................................................................................................................... 5
Table Index ............................................................................................................................................... 7
Figure Index .............................................................................................................................................. 9
1 Introduction ..................................................................................................................................... 11
1.1. Special Marks ........................................................................................................................11
2 Product Overview ............................................................................................................................ 12
2.1. Frequency Bands and Functions .......................................................................................... 12
2.2. Key Features ........................................................................................................................ 13
2.3. Functional Diagram ............................................................................................................... 15
2.4. Pins Assignment ................................................................................................................... 17
2.5. Pins Description .................................................................................................................... 18
2.6. EVB Kit ................................................................................................................................. 33
3 Operating Characteristics .............................................................................................................. 34
3.1. Power Supply ....................................................................................................................... 34
3.1.1. Power Supply Interface ................................................................................................ 34
3.1.2. Reference Design for Power Supply ............................................................................ 34
3.1.3. Requirements for Voltage Stability ............................................................................... 35
3.2. Turn On ................................................................................................................................. 36
3.2.1. Turn On with PWRKEY ................................................................................................ 36
3.2.2. Turn On with PON_1 .................................................................................................... 37
3.3. Turn Off/Restart .................................................................................................................... 38
3.4. Standby ................................................................................................................................ 38
3.5. Power Output ........................................................................................................................ 38
4 Application Interfaces ..................................................................................................................... 40
4.1. USB Interfaces ..................................................................................................................... 40
4.1.1. Micro USB Interface ..................................................................................................... 41
4.1.2. USB Type-A Interface .................................................................................................. 43
4.1.3. USB Interface Design Considerations ......................................................................... 44
4.2. VOL_UP/BOOT .................................................................................................................... 45
4.3. SD Card Interface ................................................................................................................. 46
4.4. UART .................................................................................................................................... 48
4.5. I2C Interfaces ....................................................................................................................... 49
4.6. I2S Interfaces ....................................................................................................................... 50
4.7. PDM Interface ....................................................................................................................... 51
4.8. Analog Audio Interfaces ........................................................................................................ 51
4.8.1. Microphone Interface Reference Design ..................................................................... 52
4.8.2. Headset Interface Reference Design ........................................................................... 53
4.8.3. Loudspeaker Interface Reference Design ................................................................... 54