User's Manual

UMTS/HSPA Module Series
UC20 User Manual
UC20_Hardware_Design Confidential / Released 4 / 84
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 4
Table Index ................................................................................................................................................... 7
Figure Index ................................................................................................................................................. 8
1 Introduction ........................................................................................................................................ 10
1.1. Safety Information ............................................................................................................... 11
2 Product Concept ................................................................................................................................ 12
2.1. General Description ............................................................................................................. 12
2.2. Directives and Standards ..................................................................................................... 13
2.2.1. FCC Statement ........................................................................................................... 13
2.2.2. FCC Radiation Exposure Statement ........................................................................... 13
2.3. Key Features ....................................................................................................................... 14
2.4. Functional Diagram ............................................................................................................. 16
2.5. Evaluation Board ................................................................................................................. 17
3 Application Interface ......................................................................................................................... 18
3.1. General Description ............................................................................................................. 18
3.2. Pin Assignment.................................................................................................................... 19
3.3. Pin Description .................................................................................................................... 20
3.4. Operating Modes ................................................................................................................. 26
3.5. Power Saving ...................................................................................................................... 27
3.5.1. Sleep Mode ................................................................................................................ 27
3.5.1.1. UART Application ............................................................................................. 27
3.5.1.2. USB Application with Suspend Function ........................................................... 28
3.5.1.3. USB Application without Suspend Function ...................................................... 28
3.5.2. Airplane Mode ............................................................................................................ 29
3.6. Power Supply ...................................................................................................................... 30
3.6.1. Power Supply Pins ..................................................................................................... 30
3.6.2. Decrease Voltage Drop .............................................................................................. 30
3.6.3. Reference Design for Power Supply ........................................................................... 31
3.6.4. Monitor the Power Supply .......................................................................................... 32
3.7. Turn on and off Scenarios .................................................................................................... 32
3.7.1. Turn on Module Using the PWRKEY .......................................................................... 32
3.7.2. Turn off Module .......................................................................................................... 34
3.7.2.1. Turn off Module Using the PWRKEY Pin........................................................... 34
3.7.2.2. Turn off Module Using AT Command ................................................................ 35
3.7.2.3. Automatic Shutdown ......................................................................................... 35
3.8. Reset the Module ................................................................................................................ 36
3.9. RTC Backup ........................................................................................................................ 38