UMTS/HSPA Module Series
UC20 Hardware Design
UC20_Hardware_Design Confidential / Released 4 / 82
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 4
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 ..................................................................................................................... 15
3
Application Interface ......................................................................................................................... 16
3.1.
General Description ................................................................................................................. 16
3.2.
Pin Assignment ........................................................................................................................ 17
3.3.
Pin Description ......................................................................................................................... 18
3.4.
Operating Modes ..................................................................................................................... 24
3.5.
Power Saving ........................................................................................................................... 25
3.5.1.
Sleep Mode .................................................................................................................... 25
3.5.1.1.
UART Application ................................................................................................. 25
3.5.1.2.
USB Application with Suspend Function ............................................................. 26
3.5.1.3.
USB Application without Suspend Function ........................................................ 26
3.5.2.
Airplane Mode ................................................................................................................ 27
3.6.
Power Supply ........................................................................................................................... 28
3.6.1.
Power Supply Pins ......................................................................................................... 28
3.6.2.
Decrease Voltage Drop .................................................................................................. 28
3.6.3.
Reference Design for Power Supply .............................................................................. 29
3.6.4.
Monitor the Power Supply .............................................................................................. 30
3.7.
Turn on and off Scenarios ....................................................................................................... 30
3.7.1.
Turn on Module Using the PWRKEY ............................................................................. 30
3.7.2.
Turn off Module .............................................................................................................. 32
3.7.2.1.
Turn off Module Using the PWRKEY Pin ............................................................. 32
3.7.2.2.
Turn off Module Using AT Command ................................................................... 33
3.7.2.3.
Automatic Shutdown ............................................................................................ 33
3.8.
Reset the Module..................................................................................................................... 34
3.9.
RTC Backup............................................................................................................................. 36
3.10.
UART Interface ........................................................................................................................ 37
3.11.
USIM Card Interface ................................................................................................................ 40
3.12.
USB Interface .......................................................................................................................... 43
3.13.
PCM and I2C Interface ............................................................................................................ 44
3.14.
ADC Function .......................................................................................................................... 47
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