Sim Card Interface - LG -A258 Service Manual

3.9 SIM Card Interface

SIM_RESET_N
SIM_CLK
D200
DNI
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)
Signal
SIM_RST_N
SIM_CLK
SIM1_DATA
LGE Internal Use Only
VSIM_2V85
J200
1
VCC
2
RST
3
CLK
7
GND2
8
GND3
C232 D201 C233
22p DNI 0.1u
Figure 3.9.1. SIM CARD Interface
This signal makes SIM card to HW default status.
SIM card reference clock.
This signal is interface datum.
R227
4
GND1
4.7K
5
VPP
6
IO
10
GND5
9
C234
GND4
22p
Description
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3. TECHNICAL BRIEF
SIM_DATA
D202
DNI
Only for training and service purposes