3. TECHNICAL BRIEF
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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 AD6527 and MV8620.
In operating mode, the AD6527 controls the LCD module through LCD_CS, LCD_RS,
L_DATA[15:00], LCD_BACKLIGT, LCD_RESET, LCD_WR, 2V8_MM.
Signals
Description
LCD_CS
LCD driver IC chip enable.
LCD_RESET(GPIO 15)
This pin resets LCD driver IC.
LCD_RS
This pin select Command or Data.
L_DATA[15:00]
The pins carry LCD data.
LCD_WR
LCD data write enable signal.
2V8_MM
2.8V voltage is supplied to LCD driver IC.
LCD_BACKLIGHT
This pin controls LCD backlight level.
(GPO_23)
Table 3-2. LCD CONTRON SIGNALS DISCRIPTION
Figure 3-8.
(GPIO_23)
CHARGE PUMP
C408
1u
FB403
FB404
1K
R414
1u
C407
C412
27p
C410
1u
FB402
ISINK3
12
1
ISINK4
5
OUTCP
13
PGND
3
C1+
C1-
4
6
C2+
C2-
7
2
EN_SET
GND
9
8
IN
ISINK1
10
11
ISINK2
R415
U405
AAT3152IWP
10K
C409
1u
VBAT
FB405
VMLED
VMLED
MLED1
MLED2
MLED3
LCD_BACKLIGHT
Содержание KG920
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