LG KG245 Service Manual page 23

3. TECHNICAL BRIEF
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, CL765A
If CL765A is in the state of by-pass mode, the LCD control signals from AD6527 are by-passed
through CL765A.
In operating mode, the CL765A 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], 2V8_MV,1.8_MV.
Signals
L_MAIN_LCD_CS
L_SUB_LCD_CS
LCD_RESET (GPIO 15)
LCD_WR
LCD_RD
LCD_RS
2V8_MV,1V8_MV
LCD_SIGNAL1
(GPIO_16)
LCD_SIGNAL2
(GPIO_17)
MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin
SUB LCD driver chip enable. SUB LCD driver IC has own CS pin
This pin resets LCD module. This signal comes from DBB 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.
2.85V voltage is supplied to LCD driver IC.
For the future.
Table 3-3. LCD CONTRON SIGNALS DISCRIPTION
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Description