參數(shù)資料
型號: LC74732W
元件分類: 畫面疊加
英文描述: ON-SCREEN DISPLAY IC, PQFP64
封裝: SQFP-64
文件頁數(shù): 6/38頁
文件大?。?/td> 153K
代理商: LC74732W
No. 6527-14/38
LC74732W
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
Initial value (depends on IR)
0
1
1-2-1
1-2-2
1-2-3 Fixed
0
RRM0
1
0
1-2-2
1-2-3
Fixed
1
1-2-3
Fixed
Second byte
DA0 to 7
Register
Content
Notes
State
Function
7
0
Second byte identification bit
6
VP6
0
If VS is the vertical display start position then:
The vertical display start position is set by the 7 bits
(MSB)
1
VP0 to VP6.
5
VP5
0
The weight of bit 1 is 2H.
1
H: the horizontal synchronization pulse period
4
VP4
0
α = 20H (525H systems)
1
= 25H (625H systems)
3
VP3
0
1
2
VP2
0
1
VP1
0
1
0
VP0
0
(LSB)
1
6
VS =
α + H × (2 ∑ 2 nVPn)
n=0
HSYNC
HS
VS
Character display area
VSYNC
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