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 21 / 84
USB_VBUS
71
PI
USB detection.
Vmax = 5.25V
Vmin = 3.0V
Vnorm = 5.0V
USB_DP
69
IO
USB differential data
bus.
Compliant with USB
2.0 standard
specification.
Require differential
impedance of 90Ω.
USB_DM
70
IO
USB differential data
bus.
Compliant with USB
2.0 standard
specification.
Require differential
impedance of 90Ω.
USIM Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USIM_GND
10
Specified ground for
USIM card.
USIM_VDD
14
PO
Power supply for
USIM card.
For 1.8V USIM:
Vmax = 1.98V
Vmin = 1.62V
For 3.0V USIM:
Vmax = 3.3V
Vmin = 2.7V
I
O
max = 50mA
Either 1.8V or 3V is
supported by the
module automatically.
USIM_DATA
15
IO
Data signal of USIM
card.
For 1.8V USIM:
V
IL
max = 0.27V
V
IH
min = 1.26V
V
IH
max = 1.8V
V
OL
max = 0.27V
V
OH
min = 1.26V
For 3.0V USIM:
V
IL
max = 0.45V
V
IH
min = 2.1V
V
IH
max = 3.0V
V
OL
max = 0.45V
V
OH
min = 2.1V
Pull-up to USIM_VDD
with 15k resistor
internally.
USIM_CLK
16
DO
Clock signal of USIM
card.
For 1.8V USIM:
V
OL
max = 0.36V
V
OH
min = 1.26V
For 3.0V USIM:
V
OL
max = 0.5V
V
OH
min = 2.1V