LG C1150 Service Manual page 24

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 DBB chipset, AD6525.
When LCD operate, the AD6525 controls the LCD module through LCD_CS, LCD_RESET, ADD01,
WR, DATA[00-15]. LCD_ID, LCD_RESET
Signals
LCD_CS
LCD_RESET
ADD1(RS)
WR
DATA[00-15]
2V8_VEXT
LCD_DIM
Table 3-3. LCD CONTROL SIGNALS DISCRIPTION
MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin
This pin resets LCD module.
This pin determines whether the data to LCD module are display data
or control data. ADD1 can select 16 bit parallel bus. ADD1 is also used
to address flash memory.
Write control. The phone do not read data from LCD chip.
Parallel data lines. Color LCD driver chip uses the 16-bit data interface.
2.8V voltage is supplied to white colored LED driver for backlighting.
Control signal of white LED driver IC.
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3. TECHNICAL BRIEF
Description