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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
4.7. SIM Detect Trouble Shooting
SIM interface scheme is shown below.
SIM_IO, SIM_CLK, SIM_RST ports are used to communicate DBB with ABB
and the Charge Pump in ABB enables 1.8V/3V SIM operation.
SIM_CLK : SIM Card reference clock SIM_PWRCTRL : SIM Card power activation
SIM_RST : SIM Card async/sync reset SIM_IO : SIM Card bi-directional data line
<Fig.1> SIM Circuit Diagram
TP4
TP3
TP2
TP1
TP4
TP3
TP2
TP1
n
oitcu
d
o
r
P
ss
a
M r
o
F
K0
01
902R
CM
M
V
_5
8V
2
p
00
01
4
12C
11
12R
00
2A
V
202
C
u1.0
10
1
2R
1
0
2A
V
OI
V
_8V
1
20
2AV
612R
K
1
S
_CMM
V_5
8
V2
31
2C
u
1
13
0
2R
10KR200
22R205
2
12C
p
2
2
1
8
0
2
R
M
I
S
V
_
5
8V2
8
8
C1
C1
C2
C2
C3
C3
C5
C5
C6
C6
C7
C7
6
1
1DN
G
2
D
N
G
51
3DN
G
41
31
4D
N
G
5DN
G
2
1
11
6
DN
G
AW
S
0
1
9
BWS
002
S
1
1
2
2
3
3
4
4
5
5
6
6
7
7
1
7
0
2
R
1
6
02R
1
4
0
2
R
DMC_F
T
KLC_FT
0
TA
D
_FT
1T
AD
_
F
T
SIM_RST
SIM_IO
SIM_CLK
SIM_PWRCTRL
TCETED_FT_
2
TAD
_
F
T
3
TAD
_F
T
S
_2
TA
D_
F
T
S_
3TA
D_FT
S_DMC_FT
S_K
L
C_FT
S_
0TA
D
_
F
T
S_1TA
D
_FT
TP1
TP2
TP4
TP3
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