LG KP500 - Phone as Modem

3.22 Front End Module control
Implemented in the S-Gold3 (FL600) are two outputs which are FE1, FE2 for direct control of front end
modules with two logic input pins to select RX and TX mode as well as low and high band operation.
FEM need 2V85_VRF supply.
Table 12 FEM Control Logic
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3. TECHNICAL BRIEF
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MODE Tx 1GHz Tx 2GHz Rx 1GHz Rx 2GHz
VDD ON ON ON ON
VC1 OFF ON OFF ON
VC2 ON ON OFF OFF
RF
G
R
S
3
0
2
-
2
S
-
H
2
2
-
E
3
0
0
0
E
N
W
Y
0
0
0
6
3
0
1
TN
A
1G
2G
FR
1
0
6
C
I
N
D
SW600
GN
D60
1
50
6
C
p
7
4
206
C
u
1
G
S
M
1
9
0
0
_
R
X1
G
S
M
1
9
0
0
_
R
X2
8
G
S
M
8
5
0
_
9
0
0
_
T
X
1
5
1
G
S
M
8
5
0
_
R
X1
G
S
M
8
5
0
_
R
X
2
2
3
G
S
M
9
0
0
_
R
X
1
4
G
S
M
9
0
0
_
R
X2
V
C
1
1
4
1
3
V
C
2
V
D
D
1
2
A
N
T
71
9
G
N
D
1
1
1
G
N
D
2
1
6
G
N
D
3
1
8
G
N
D
4
1
9
G
N
D
5
2
0
G
N
D
6
G
SM
1
8
0
0
_
1
9
0
0
_
T
X
1
0
G
S
M
1
8
0
0
_
R
X1
5
G
S
M
1
8
0
0
_
R
X2
6
7
F
L
60
0
SFAY00
11
1
01
DG
M
1
1
10M01
4
1
L
0
16
R
0
GND
6
00
IND
1
1
6
C
V
RF_2
V8
5
9
0
6
C
IN
D
40
6
C
p
7
4
906R
0
Hn2.2
3
0
6
L
IND
00
6
C
1
1
6R
0
3
0
6
C
p9
3
p081
6
0
6
C
1
0
6
L
H
n
2
1
16C
1
EF
2E
F
Figure 29 FEM schematic