LG GD910 - SIM Interface

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Only for training and service purposes
3. BB Circuit Technical brief
GD910 service manual
3.5 SIM Interface
GD910 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
C245
33p
C247
1u
4.7K
R212
2V9_SIM
2V9_SIM
C246
DNI
C248
33p
CLK
3
4
GND1
GND2
7
8
GND3GND4
9
10
GND5
IO
6
2
RST
1
VCC
VPP
5
J200
SIM_IO SIM_CLK
SIM_RST
GD910 service manual
Figure 3.5-1] SIM Circuit