參數(shù)資料
型號： HD66841
廠商： Hitachi,Ltd.
英文描述： LVIC-II (LCD Video Interface Controller)(LCD視頻控制器)
中文描述： LVIC - 2（液晶視頻接口控制器）（液晶顯示視頻控制器）
文件頁數(shù)： 24/62頁
文件大?。?/td> 185K
代理商： HD66841
HD66841
24
LDOTCK Frequency Calculation
The frequency f
L
of the LCD dot clock (LDOTCK) can be obtained from the following equation:
f
L
= (Nhd + 6/m)
×
8
×
Nvd
×
F
Nhd:Number of horizontal characters displayed on LCD
Nvd:Number of vertical lines displayed on LCD
m: Parameter which decided by LCD mode
Screen Configuration
Mode No.
m
Dual
1, 6
2
Single
Other modes
1
f
F
: FLM frequency
In this case, f
L
must satisfy the following relation, where f
D
is the frequency of the dot clock for CRT
display (DOTCLK):
f
L
< f
D
×
15/16 or
f
L
= f
D
(The phase of LDOTCK must be same to that of DOTCLK when DOTE is high, the
phase of LDOTCK must be opposite to that of DOTCLK when DOTE is low.
Condition of timing between LDOTCK and DOTCLK must be observed are
shown in Figure 9.)
When DOTE
is high
When DOTE
is low
LDOTCK
DOTCLK
LDOTCK
DOTCLK
1.5V
10 ns min
10 ns min
1.5V
1.5V
10 ns min
10 ns min
1.5V
1.5V
1.5V
Figure 9 Relationships between DOTE and LDOTCK, DOTCLK
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