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參數資料
| 型號： | LC7442 |
| 元件分類： | 畫面疊加 |
| 英文描述： | PICTURE-IN-PICTURE IC, PDIP64 |
| 封裝： | SDIP-64 |
| 文件頁數： | 2/23頁 |
| 文件大小： | 317K |
| 代理商： | LC7442 |
— Vertical frame horizontal thickness
Memory Map
The 1 Mbyte VRAM is divided into 4 fields.
0
COL
511
(0, 0)
(1, 0)
(ARS1, ARS0)
(0, 1)
(1, 1)
Read Selection
Mode
ARS1
ARS0
Screen state
2-screen frame
Automatic switching
by the field determination
based on the position
circuit
of the A and B screens
2-screen field
A screen = FLD-A
As above
B screen = FLD-B
3-, 4-screen field
B0*
0
(automatic switching)
B1*
0
1
B2*
1
0
B3*
1
* The order B0 to B3 is fixed.
Write Selection
Dynamic image display is controlled by setting MVS0 and MVS1.
Mode
ARS1
ARS0
2-screen frame
Automatic switching by the field
[MVS0]
determination circuit
2-, 3-, 4-screen field
[MVS1]
[MVS0]
LC7442, 7442E
No. 4412-10/22
WKAJ: 4 steps in 132 ns increments
D/A converter output
0
ROW
511
Note: When [YCAJ1,0] = 00, use care when setting [WKAJ1,0] to values other than 00, since incorrect color data may appear at the right edge.
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