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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
Figure 3.5-1] SIM Circuit
22pC246
0.1uC237
3
C3
C5
4
5
C6
6
C7
GND1
7
8
GND2
9
GND3
10
GND4
J200
5000-6P-1.8SL
ENSY0018701
C1
1
C2
2
2V9_SIM
R236 4.7K
C245 DNI
C248
22p
SIM_IO
SIM_RST
SIM_CLK
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