Only For Training And Service Purposes - LG KP110 Service Manual

3.5.1 Interconnection with external devices
A. RTC block interface
Countered by external X-TAL
The X-TAL oscillates 32.768KHz
B. LCD module interface
Signals
nLCD_MAIN_CS
LCD_SCLK
LCD_ID
nLCD_RESET
LCD_SDATA
LCD & CHARGE PUMP
MLED
LCD_BACKLIGHT_CTRL
LCD Connector
nLCD_RESET
LCD_SCLK
MLED
MLED2
Copyright © 2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin
This signal transfer serial clock to driver IC.
Select LCD module maker(2.8V : GP, 0V : SHARP)
This pin resets LCD module. This signal comes from AD6724 directly.
This signal transfer serial data to driver IC.
VBAT
C221
1u
ECZH0001215
R216
11
75K
C225 C241 C226
R219
43K
DNI 1u 27p
J202
1
3
MIPG
R223 47
5
R226 47 7
9
11
13
VA207
C231 C232 R230
DNI 27p 100K
IMSA-9671S-13Y912
EVLC5S0250
SEVY0005201
ENQY0014701
Table 3.5.B LCD CONTRON SIGNALS DISCRIPTION
3. TECHNICAL BRIEF
Description
U202 AAT3157ITP-T1
5 10
IN C1+
C220
ECCH0004904
1u
9
C1-
7
C2+
C222
8
CP ECCH0004904
1u
6
C2-
EN_SET
1
D1
2
D2
3
D3
4 12
GND NC
C223 C224
27p 27p
EUSY0238702
2V8_VEXT
MAKER
GP
SHARP
2
MIPD
4
R224 47
6
R227 47
8
10
12
14
15 C234
C235 C236
1u
27p 27p
- 23 -
MLED1
MLED2
ID Voltage
High 2.8V
Low 0V
nLCD_MAIN_CS
LCD_SDATA
MLED1
LCD_ID
C237 C238
DNI DNI
LGE Internal Use Only