3. TECHNICAL BRIEF
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3.4.1 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 AD6527B(U102),DBB.
In operating mode, the AD6527B(U102) controls the LCD module through _LCD_CS,
LCD_DIM_CTRL, LCD_RESET, LCD_WR, LCD_CS, 2V8_MV, IF_MODE.
Signals Description
_LCD_CS MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin
LCD_DIM_CTRL It controls dimming mode of LCD module.
LCD_RESET
This pin resets LCD module. This signal comes from DBB directly.
(GPIO 15)
_WR Enable writing to LCD Driver.
2V8_MV 2.8V voltage is supplied to LCD driver IC.
Table 3-2. LCD CONTROL SIGNALS DESCRIPTION
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