Torch Led Interface - LG -A100 Service Manual

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.
UART_RX
UART_TX
EAR_L
EAR_R
HS_MIC
VDD_IO_1V8
R223
10K
ABB_INT_N
LGE Internal Use Only
VBAT
C208
1u
DSS
VAUX_2V85
3
VIN
R212
25
VBAT1
100Kohms
26
VBAT2
27
EXPDET
11
DN
12
DP
13
U1
14
U2
R218 0
15
AUD1
R219 0
16
AUD2
R220 0
17
MIC
R221
32
DSS
300Kohms
VAUX_2V85
I2C_SDA
I2C_SCL
R224
10K
Figure 3.14.1 Torch LED Block
VBAT
23
VBUS1
24
VBUS2
22
D-
21
U205
D+
FB204
20
UID
19
RES
18
CAP
C218
1u
R225
10K
- 5 - Copyright © 011 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
3V1_TORCH
VUSB_CHG_IN
C214
C259
1u
1u
MUIC_IO_M
MUIC_IO_P
0
MUIC_ACC_ID
R216
2.2K
C217
DNI
Only for training and service purposes