3. TECHNICAL BRIEF
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3.5.1 Interconnection with external devices
A. RTC block interfaceCountered by external X-TALThe X-TAL oscillates
32.768KHz
B. LCD module interface
The LCD module is controlled by AD6527(U100),DBB.In operating mode, the AD6527(U100)
controls the LCD module through _LCD_CS, LCD_DIM_CTRL, LCD_RESET, _WR,
2V8_VMEM, LCD_ID, LCD_BL_EN.
Table 3-3 LCD CONTRON SIGNALS DISCRIPTION
Description
_LCD_CS
LCD_DIM_CTRL
LCD_RESET
(GPIO 15)
_WR
2V8_VMEM
LCD_ID
(GPIO 16)
LCD_BL_EN
Signals
MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin
It controls dimming mode of LCD module. (GPIO_5)
It determines the maker of LCD module.
It controls back-light of LCD module. (GPO_23)
This pin resets LCD module. This signal comes from DBB directly
2.8V voltage is supplied to LCD driver IC
Enable writing to LCD Driver.
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