User's Manual
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Concept
- 3 Application Interface
- 3.1. General Description
- 3.2. Pin Assignment
- 3.3. Pin Description
- 3.4. Operating Modes
- 3.5. Power Saving
- 3.6. Power Supply
- 3.7. Turn on and off Scenarios
- 3.8. Reset the Module
- 3.9. RTC Backup
- 3.10. UART Interface
- 3.11. USIM Card Interface
- 3.12. USB Interface
- 3.13. PCM and I2C Interface
- 3.14. ADC Function
- 3.15. Network Status Indication
- 3.16. Operating Status Indication
- 3.17. Behavior of the RI
- 4 GNSS Receiver
- 5 Antenna Interface
- 6 Electrical, Reliability and Radio Characteristics
- 7 Mechanical Dimensions
- 8 Storage and Manufacturing
- 9 Appendix A Reference

UMTS/HSPA Module Series
UC20 Hardware Design
UC20_Hardware_Design Confidential / Released 22 / 84
USIM_RST
17
DO
Reset signal of
USIM card.
For 1.8V USIM:
V
OL
max = 0.22V
V
OH
min = 1.44V
For 3.0V USIM:
V
OL
max = 0.36V
V
OH
min = 2.4V
USIM_PRE
SENCE
13
DI
USIM card insertion
detection.
V
IL
min = -0.3V
V
IL
max = 0.6V
V
IH
min = 1.2V
V
IH
max = 2.0V
1.8V power domain.
ADC Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
ADC0
45
AI
General purpose
analog to digital
converter.
Voltage range:
0.2V to 2.1V
ADC1
44
AI
General purpose
analog to digital
converter.
Voltage range:
0.2V to 4.2V
Main UART Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
RI
62
DO
Ring indicator.
V
OL
max = 0.45V
V
OH
min = 1.35V
1.8V power domain.
DCD
63
DO
Data carrier
detection.
V
OL
max = 0.45V
V
OH
min = 1.35V
1.8V power domain.
CTS
64
DO
Clear to send.
V
OL
max = 0.45V
V
OH
min = 1.35V
1.8V power domain.
RTS
65
DI
Request to send.
V
IL
min = -0.3V
V
IL
max = 0.6V
V
IH
min = 1.2V
V
IH
max = 2.0V
1.8V power domain.
DTR
66
DI
Data terminal ready.
V
IL
min = -0.3V
V
IL
max = 0.6V
V
IH
min = 1.2V
V
IH
max = 2.0V
1.8V power domain.
Pull-up by default.
TXD
67
DO
Transmit data.
V
OL
max = 0.45V
V
OH
min = 1.35V
1.8V power domain.