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3.9 LCD and LCD Backlight
(1) LCD Features
Display Mode : Transmissive 65K Color STN LCD
Color Depth : 32 (Red) * 64 (Green) * 32 (Blue) = 65K Color
Resolution : 128 * RGB * 128 dots for Color display
Interface : 80-series MPU interface
Data bus : 16 bit Parallel interface
Duty ratio : 1/96 Duty for Color display
Viewing Direction : 12 o'clock
LCD Driver : S6B33B2 by SEC
Display RAM capacity : 132 x 16 x 162 = 342.144K bits for Color display
Control Signal is explained in Table 3-3.
(2) LCD Backlight
For LCD backlight illumination, there is a driver (U600) which is driven by LCD_DIM signal from
AD6525. Power for the driver is supplied by VBAT.
VBAT
10
C601
1uF
2
C603
1uF
9
LCD_DIM
11
Figure 3-14. Circuit Diagram of Driver IC for LCD backlight.
U600 AAT3123ITP-20-T1
4
IN
C1+
C602
1uF
3
OUT
C1-
1
C2+
1uF
C604
BL_LED
EN_SET
12
C2-
8
D1
7
D2
6
C605
D3
5
39p
GND
D4
- 29 -
3. TECHNICAL BRIEF
FB1
C631
39p
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