Sim Card Interface - LG -T370 Service Manual

3.8 SIM Card Interface

SIM_DATA_1
SIM_CLK
SIM_RST_N
VA308
C315
33p
SIM_RST_2
SIM_RST_SEL
2V85_VSIM
The Main Base Band Processor(XMM15) provides SIM Interface Module.
The XMM15 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, 5 signals SIM_DATA_1, SIM_DATA_, SIM_CLK, SIM_RST_N, SIM_RST_
And This model supports .85V SIM Card.
Signal
SIM_RST_N
SIM_CLK
SIM_DATA_1
LGE Internal Use Only
2V85_VSIM
2V85_VSIM
VA309
C316 C317
33p 33p
C321
0.1u
2V85_VSIM
C322
3
1A 2B1
4 U302
S1 2A
R323
5
1B0 S2
10K
R325
EUSY0186504
100K
FSA2259UMX
Figure 3-8-1.Dual SIM CARD Interface
This signal makes SIM card to HW default status.
I/O1 CLK2
C7 C3_1
CLK1 I/O2
C3 C7_1
VPP1 RST2
S301
C6 C2_1
RST1 VPP2
5000-12P-2_95D-A1-R0
C2 C6_1
GND1 EAG63211701 VCC2
C5 C1_1
VCC1 GND2
C1 C5_1
1u
10
SIM_DATA_2
9 SIM_DATA
8
SIM_SEL
SIM_DATA_1
R324
100K
Description
This signal is transferred to SIM card.
This signal is interface datum.
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3. TECHNICAL BRIEF
2V85_VSIM 2V85_VSIM
VA311
C318
C319
VA310 C323
C320
33p
33p
33p
0.1u
Only for training and service purposes
SIM_CLK
SIM_DATA_2
SIM_RST_2
VA312