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3. TECHNICAL BRIEF
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LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.9 SIM Card Interface
Figure 3.9.1. SIM CARD Interface
Signal
Description
SIM_RST_N
This signal makes SIM card to HW default status.
SIM_CLK
SIM card reference clock.
SIM1_DATA
This signal is interface datum.
The Main Base Band Processor(XMM2130) provides SIM Interface Module.
The XMM2130 checks status Periodically During established call mode whether SIM card is inserted or not, but
it doesn't check during deep sleep mode. In order to communicate with SIM card, 3 signals SIM_DATA,
SIM_CLK, SIM_RST.
SIM interface scheme is shown in (Figure 3.9.1).
SIM_DATA, SIM_CLK, SIM_RST ports are used to communicate with Main Chip(AGR+NAND)
J200
9
8
10
7
6
3
5
2
4
1
VCC
GND1
RST
VPP
CLK
IO
GND2
GND5
GND3
GND4
DNI
D202
0.1u
C233
22p
C232
DNI
D201
4.7K
R227
22p
C234
DNI
D200
VSIM_2V85
SIM_DATA
SIM_CLK
SIM_RESET_N