參數(shù)資料
型號(hào): LC74731
廠商: Sanyo Electric Co.,Ltd.
英文描述: On-Screen Display Controller
中文描述: 屏幕顯示控制器
文件頁數(shù): 14/38頁
文件大?。?/td> 157K
代理商: LC74731
No. 6526-14/38
LC74731W,74732W
COMMAND20 (Vertical display start position setup command)
First byte
DA0 to 7
Register
Content
Notes
State
Function
7
1
Command 2 identification code
6
0
Vertical display position and vertical direction character size
5
1
settings
4
0
3
0
Extended command 0 identification code
2
0
1
RRM1
0
RRM1
RRM0
Continuous RAM write mode specification
1
0
0
Initial value (depends on IR)
0
0
1
1-2-1
1-2-2
1-2-3 Fixed
0
RRM0
1
1
0
1-2-2
1-2-3
Fixed
1
1
1-2-3
Fixed
Second byte
DA0 to 7
Register
Content
Notes
State
Function
7
0
Second byte identification bit
6
VP6
(MSB)
0
If VS is the vertical display start position then:
The vertical display start position is set by the 7 bits
VP0 to VP6.
1
5
VP5
0
The weight of bit 1 is 2H.
1
H: the horizontal synchronization pulse period
α
= 20H (525H systems)
= 25H (625H systems)
4
VP4
0
1
3
VP3
0
1
2
VP2
0
1
1
VP1
0
1
0
VP0
(LSB)
0
1
6
VS =
α
+ H
×
(2
2
n
VPn)
n=0
HSYNC
HS
VS
Character display area
V
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