LG PRADA KE850 - Message Templates and Settings

3. TECHNICAL BRIEF
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3.5. SIM interface
KE850 supports 1.8V & 3V plug in SIM, SIM interface scheme is shown in (Figure 10).
SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-Gold2) and the SIM power
supply enabled by BBP (_SIM_EN).
SIM Interface
SIM_CLK : SIM card reference clock
SIM_RST : SIM card Async /sync reset
SIM_IO : SIM card bidirectional reset
Figure 10 SIM CARD Interface
J201
CLK
34
GND
I_O
6
RST
2
1
VCC
5
VPP
10K
R224
0.1u
C237
Q202
D
G
S
SI1305-E3
C236
22p
150p
C238
VA201
2V85_SIM
SIM_CLK
SIM_IO
SIM_RST
SIM_EN_n