Sim Interface - LG GW520 Service Manual

3. BB Circuit Technical brief

3.5 SIM Interface

GW520 supports 1.8V & 2.9V plug in SIM. SIM_IO, SIM_CLK, SIM_RST ports are
used to communicate with S-Gold3H and the SIM power supply enabled by PMIC.
SIM Interface
SIM_CLK : SIM card reference clock
SIM_RST : SIM card Async /sync reset
SIM_IO : SIM card bidirectional reset
SIM_IO
LGE Internal Use Only
2V9_SIM
R236 4.7K
J200
4 1
C5 C1
5 2
C6 C2
6 3
C7 C3
10 7
GND4 GND1
9 8
GND3 GND2
ENSY0018701
5000-6P-1.8SL
Figure 3.5-1] SIM Circuit
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GW520 service manual
SIM_RST
SIM_CLK
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