User's Manual
Table Of Contents
- Copyright
- Attention
- Trademark
- Versions
- Applicable Model List
- Foreword
- Product Overview
- Structure
- Hardware Introduction
- Hardware Interface
- Electrical and Environmental Characteristic
- RF Interface
L811-EA Module Hardware User Manual Page
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5.7.2 USIM Interface Design
5.7.2.1 “Normally Closed” SIM Card Circuit Design
Reference Circuit Design:：
Figure 5- 7 Reference Design of “Normally Closed” SIM Card Interface
Normally closed SIM Connector:
1）When detaching the SIM card, pin 7 and pin 8 shorted together.
2）When inserting the SIM card, pin 7 and pin 8 opened.
5.7.2.2 “Normally Open” SIM Circuit Design
Referenced Circuit Design:
Figure 5- 8 Reference Design of “Normally Open” SIM Card Interface
Normally open SIM Connector:
1）When detaching the SIM card, pin 7 and pin 8 opened .
2）When inserting the SIM card, pin 7 and pin 8 shorted.