3. TECHNICAL BRIEF
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Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3.14 Torch LED Interface
Torch LED is controlled by LDO port(LDO4) of RT8966.
There are four LDOs in the RT8966. These LDOs can be programmed via I2C in the following control registers
Enable, OUT Set1, OUT Set2.
These registers include each LDO's enable/disable control as well as its output voltage selection from 1V to 3.3V.
Figure 3.14.1 Torch LED Block
0
R219
R220
0
U205
33
82
27
26
13
25
11
01
24
23
13
22
92
21
20
14
12
7
2
9
5
32
19
18
17
8
03
6
16
4
3
15
1
1T
U
O
AUD1
VIN
3T
U
O
AUD2
1
D
N
G
L
C
S
2
D
EL
MIC
CAP
RES
DSS
4T
U
O
3
D
EL
2T
U
O
1
D
EL
DP
U2
UID
D+
A
D
S
D-
\T
NI
VBUS1
VBUS2
4
D
EL
DN
VBAT1
U1
VBAT2
EXPDET
2
D
N
G
D
N
G
P
C259
1u
VAUX_2V85
1u
C218
R223
10K
VBAT
VDD_IO_1V8
C217
DNI
R212
100Kohms
VUSB_CHG_IN
10K
R224
10K
R225
2.2K
R216
R218
0
R221
300Kohms
DSS
VAUX_2V85
3V1_TORCH
VBAT
FB204
0
C214
1u
C208
1u
I2C_SDA
I2C_SCL
UART_TX
UART_RX
1
D
EL
M
EAR_R
EAR_L
2
D
EL
M
ABB_INT_N
MUIC_ACC_ID
D
EL
_
Y
E
K
MUIC_IO_P
MUIC_IO_M
HS_MIC