W Sub System - LG E900 Service Manual

3. TECHNICAL BRIEF
3.10 H/W Sub System
3.10.1 USIM Interface
SIM interface scheme is shown in Figure.
And, there control signals are followed
USIM_CLK : USIM Clock
USIM_Reset : USIM Reset
USIM_Data : USIM Data T/Rx
QSD8650
3.10.2 UART Interface
UART signals are connected to MSM GPIO through IO connector with 115200 bps speed.
GPIO_Map Name
GPIO_86 UART3_RX
GPIO_87 UART3_TX
LGE Internal Use Only
USIM CLK
USIM Reset
PM7540
USIM Data
Figure. SIM Interface
Table. UART Interface
VREG_RUIM_ 2.85V
USIM CLK
USIM Reset
USIM Data
Note
Data_Rx
Data_Tx
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USIM
Only for training and service purposes