- 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, AIT813G
If AIT701G is in the state of by-pass mode, the LCD control signals from AD6721 are by-passed
through AIT813G.
In operating mode, the AIT813G 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].
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Signals Description
L_MAIN_LCD_CS MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin
LCD_ID Select LCD modoule maker(2.4V : HITACHI, 0V : LGIT)
LCD_RESET This pin resets LCD module. This signal comes from AD6721 directly.
LCD_WR Enable writing to LCD Driver.
LCD_RD Enable reading to LCD Driver.
LCD_RS This pin determines whether the data to LCD module are display
data or control data. LCD_RS can select 16 bit parallel bus.
2V8_VLCD 2.8V voltage is supplied to LCD driver IC.
IF_MODE
Select 16bits or 8bits interface mode for MAIN LCD.
For the future
Table 3-2 . LCD CONTRON SIGNALS DISCRIPTION
To Next Page
Loading...
