LG A395 Service Manual page 39

The Main Base Band Processor(MT6255) contains two dedicated smart card interfaces to allow the
MCU to access the two SIM cards. Each interface can operator via 5 terminals. As shown is the Figure
3.8.2, SIMVCC, SIMSEL, SIMRST, SIMCLK and SIMDATA are for one SIM interface, while SIM2VEE, SIM2SEL,
SIM2RST, SIM2CLK and SIM2DATA are for the other one.
The functions of the two SIM interfaces are identical; therefore, only first SIM interface will be described
in this document.
The VSIM is used to control the external voltage supply to the SIM card and SIM SEL determines the
regulated smart card supply voltage. SIMRST is used as the SIM card reset signal. Besides, SIMDATA and
SIMCLK are used for data exchange purpose.
A395 is using U202 as SIM controller to be able to use Quad SIM.
LGE Internal Use Only
LGE Internal Use Only
Figure 3.7.3 SIM Interface block diagram
Figure 3.7.3 SIM Interface block diagram
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3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes