Quectel UC15, Hardware Design

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UMTS/HSDPA Module
UC15 Hardware Design
UC15_Hardware_Design Confidential / Released 3 / 72
Contents
About the document ................................................................................................................................ 2
Contents .................................................................................................................................................... 3
Table Index ............................................................................................................................................... 5
Figure Index .............................................................................................................................................. 6
1
Introduction ....................................................................................................................................... 7
1.1. Safety Information ................................................................................................................... 8
2
Product Concept ............................................................................................................................... 9
2.1. General Description ................................................................................................................ 9
2.2. Key Features ......................................................................................................................... 10
2.3. Functional Diagram ............................................................................................................... 12
2.4. Evaluation Board ................................................................................................................... 13
3
Application Interface ....................................................................................................................... 14
3.1. General Description .............................................................................................................. 14
3.2. Pin Assignment ..................................................................................................................... 15
3.3. Pin Description ...................................................................................................................... 16
3.4. Operating Modes .................................................................................................................. 20
3.5. Power Saving ........................................................................................................................ 22
3.5.1. Sleep Mode.................................................................................................................. 22
3.5.2. Wake up from Sleep Mode .......................................................................................... 22
3.5.3. Minimum Functionality Mode ....................................................................................... 22
3.6. Power Supply ........................................................................................................................ 23
3.6.1. Power Supply Pins ....................................................................................................... 23
3.6.2. Decrease Voltage Drop ................................................................................................ 23
3.6.3. Reference design for power supply ............................................................................. 24
3.6.4. Monitor the Power Supply ............................................................................................ 25
3.6.5. VDD_EXT .................................................................................................................... 25
3.7. Turn on and off Scenarios ..................................................................................................... 25
3.7.1. Turn on Module Using the PWRKEY ........................................................................... 25
3.7.2. Turn off Module ............................................................................................................ 27
3.7.2.1. Turn off Module Using the PWRKEY Pin .......................................................... 27
3.7.2.2. Turn off Module Using AT Command ................................................................ 28
3.7.2.3. Automatic Shutdown ......................................................................................... 28
3.8. Reset the Module .................................................................................................................. 29
3.9. UART Interface ..................................................................................................................... 30
3.9.1. The connection of UART .............................................................................................. 31
3.9.2. UART Application ......................................................................................................... 33
3.10. AUDIO Interface .................................................................................................................... 35
3.10.1. Decrease TDD noise and other noise .......................................................................... 36
3.10.2. Microphone interfaces configuration ............................................................................ 36
3.10.3. Receiver and speaker interface configuration .............................................................. 37
3.10.4. Earphone interface configuration ................................................................................. 39