User's Manual
Table Of Contents
- Copyright
- Attention
- Trademark
- Versions
- Foreword
- Product Overview
- Structure
- Hardware Introduction
- Hardware Interface
- Power Interface
- Power on/off and Reset Signal
- Status Indicating Signal
- USB /SSIC Interface
- USIM Interface
- Digital Audio
- Win8/Android Switch Control Interface
- W_DISABLE# Interface
- TX_BLANKING Interface
- WAKEUP_Host Interface
- BODY_SAR Interface
- I2C Interface
- Clock Interface
- Config Interface
- RF Interface
- Other Interfaces
- Electrical and Environmental Features
- RF Interface
L830-EA M.2 Module Hardware User Manual Page
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of
45
36
UIM_PWR
O
USIM power supply signal
30
UIM_RESET
O
USIM Reset Signal
32
UIM_CLK
O
USIM clock signal
34
UIM_DATA
I/O
USIM data signal
66
SIM_DETECT
I
USIM Plug-in detection signal , 390K resistor will be pulled up
by default.
High level indicates that SIM card is inserted.
Low level indicates that card is not inserted.
5.5.2 USIM Interface Design
5.5.2.1 “Normal Closed” SIM Card Circuit Design
Reference Circuit Design:
Figure 5- 7 Reference Design of “Normally Closed” SIM Card Interface
Normally closed SIM Connector:
1）Pull out SIM card, pin 7 and pin 8 will short-circuit .
2）Insert SIM card, pin 7 and pin 8 will disconnect.
5.5.2.2 “Normally Open” SIM Circuit Design
Referenced Circuit Design: