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Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
GS290 Operational Description Revision B
LG Electronics
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LGE Property
Figure 7 Remote power on and End-key power on circuit
3.5. SIM & uSD interface
GS290 supports 1.8V & 2.9V plug in SIM, SIM interface scheme is shown in (Figure 8).
SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-Gold3) 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 8 SIM & Micro SD Circuit
GCA26D-6S-H18-E1500
J400
9
8
10
7
6
3
5
2
4
1
C1
C5
C2
C6
C3
C7
GND1
GND4
GND2
GND3
0.1u
C401
VSIM_2V9 VSIM_2V9
R407
10K
22p
C405
C409
DNI
C410
22p
VSIM_2V9
SIM_RST
SIM_IO
SIM_CLK
SIM CONNECTOR