Only For Training And Service Purposes - LG KG280 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
The LCD module is controlled by CAMERA IC, AIT701G
If AIT701G is in the state of by-pass mode, the LCD control signals from AD6720 are by-passed
through AIT701G.
In operating mode, the AIT701G controls the LCD module through L_MAIN_LCD_CS,
L_SUB_LCD_CS, LCD_RESET, LCD_RS, LCD_WR, LCD_RD, L_DATA[15-00], 2V85_VCAM,
IF_MODE, LCD_ID[1:3].
Signals
L_MAIN_LCD_CS
LCD_ID
LCD_RESET
LCD_WR
LCD_RD
LCD_RS
2V8_VLCD
IF_MODE
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Only for training and service purposes

MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin
Select LCD modoule maker(2.4V : BYD, 0V : LGIT)
This pin resets LCD module. This signal comes from AD6720 directly.
Enable writing to LCD Driver.
Enable reading to LCD Driver.
This pin determines whether the data to LCD module are display
data or control data. LCD_RS can select 16 bit parallel bus.
2.8V voltage is supplied to LCD driver IC.
Select 16bits or 8bits interface mode for MAIN LCD.
For the future
Table 3-2 . LCD CONTRON SIGNALS DISCRIPTION
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3. TECHNICAL BRIEF
Description
LGE Internal Use Only