參數(shù)資料
型號: LC74770M
元件分類: 畫面疊加
英文描述: ON-SCREEN DISPLAY IC, PDSO24
封裝: MFP-24
文件頁數(shù): 9/11頁
文件大?。?/td> 252K
代理商: LC74770M
3
COMMAND 2 (Vertical display start position setup command)
First byte
Second byte
Note: All registers are set to 0 when the LC74770M is reset by the RST pin.
4
COMMAND 3 (Horizontal display start position setup command)
First byte
No. 4248-7/11
LC74770M
Register content
DA0 to DA7
Register name
State
Function
Note
7—
1
6—
0
Command 2 identification code
5—
1
Sets the vertical display start position.
4—
0
3—
0
2—
0
1—
0
0—
0
Register content
DA0 to DA7
Register name
State
Function
Note
7—
1
6—
0
Command 3 identification code
5—
1
Sets the horizontal display start position.
4—
1
3—
0
2—
0
1—
0
0—
0
Register content
DA0 to DA7
Register name
State
Function
Note
7—
0
Second byte identification bit
6—
0
5
VP5
0
(MSB)
1
4
VP4
0
1
3
VP3
0
1
2
VP2
0
1
VP1
0
1
0
VP0
0
(LSB)
1
The vertical display start position is set
by the 6 bits VP0 to VP5.
The weight of bit 1 is 1H.
If VS is the vertical display start position then:
5
VS = H × (Σ 2nVPn)
n = 0
H: the horizontal synchronization pulse period
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